image
imagewidth (px)
2
5.73k
material_type
stringclasses
2 values
latex
sequencelengths
1
13
HW
[ "$-2(x-1)-2(y+2)+1=0$", "$-2 x+2-2 y-4+1=0$", "$-2 x-2 y-1=0$", "$2 x+2 y-1=0$", "$\\displaystyle 2x+2y-1=0$ !!" ]
HW
[ "$x^{2}+y^{2}-6 x+4 y=0 .$", "$(x-3)^{2}+(y+2)^{2}=13 .$", "์›์˜ ์ค‘์‹ฌ์ด $\\displaystyle (3,-2)$์ด๋ฏ€๋กœ", "$\\displaystyle a=-3, b=2$์ด๋‹ค.", "๋ฐ˜์ง€๋ฆ„์€ ๊ฐ™์œผ๋ฏ€๋กœ $c=13$์ด๋‹ค.", "$a+b+c=-3+2+13=12$", "$12$" ]
HW
[ "$\\displaystyle y={x}^{2}-2ax+9={(x-a)}^{2}+9-{a}^{2}$์˜ ๊ผญ์ง“์ ์˜ ์ขŒํ‘œ๊ฐ€", "$\\displaystyle (a,9-{a}^{2})$ ์ด๋ฏ€๋กœ $\\displaystyle y$์ถ•์— ๋Œ€ํ•ด ๋Œ€์นญ์ด๋™ํ•œ ์ ์˜ ์ขŒํ‘œ๋Š”", "$\\displaystyle (-a, 9-{a}^{2})$์ด๋‹ค. ๋”ฐ๋ผ์„œ ", "$9-a^{2}=-a+5$", "$a^{2}-a-4=0$", "์ด๋ฏ€๋กœ $\\displaystyle a=\\frac{1 \\pm \\sqrt{17}}{2}$ ์ด๋‹ค. $\\displaystyle a$๋Š” ์–‘์ˆ˜์ด๋ฏ€๋กœ $\\displaystyle a=\\frac{1+\\sqrt{17}}{2}$ ์ด๋‹ค.", "$\\frac{1+\\sqrt{17}}{2}$" ]
HW
[ "$\\displaystyle 5y=-2{x}^{2}+5$ ๊ฐ€ $\\displaystyle y$์ถ•์— ๋Œ€ํ•ด ๋Œ€์นญ์ด๋™ํ•œ ๋„ํ˜•์€", "$5 y=-2(-x)^{2}+5$", "$=-2 x^{2}+5$", "$2 x^{2}+5 y-5=0$", "์ด๋‹ค.", "$2 x^{2}+5 y-5=0$" ]
HW
[ "$\\displaystyle 4y=4x+2$๊ฐ€ $\\displaystyle y=-x$์— ๋Œ€ํ•ด ๋Œ€์นญ์ด๋ฏ€๋กœ", "$\\displaystyle 4(-x) = 4(-y)+2 \\Rightarrow 4x=4y-2$ ์ด๋‹ค.", "$4 x=4 y-2$" ]
HW
[ "$x^{2}+y^{2}-10 x+8=0$", "$(x-5)^{2}+y^{2}=17$", "์›์˜ ์ค‘์‹ฌ์€ $(5,0)$์ธ๋ฐ $(3,1)$์— ๋Œ€์นญ์ด๋™ํ•˜๋ฉด", "$\\displaystyle ( 1,2)$์ด๋ฏ€๋กœ", "$(x-1)^2 +(y-2)^2 = 17$ ์ด๋‹ค.", "$(x-1)^{2}+(y-2)^{2}=17$" ]
HW
[ "$y=-2 x^{2}+8 x-2$", "$=-2\\left(x^{2}-4 x\\right)-2$", "$\\displaystyle =-2{(x-2)}^{2}+6$ $\\displaystyle \\to $ ๊ผญ์ง“์  $\\displaystyle ( 2,6)$", "$\\displaystyle x$์ถ•์œผ๋กœ $\\displaystyle a+2, \\; y$์ถ•์œผ๋กœ $\\displaystyle a$๋งŒํผ ํ‰ํ–‰์ด๋™", "ํ•˜๋ฉด, ๊ผญ์ง“์ ์€ $\\displaystyle (a+4, 6+a)$", "$\\displaystyle x$์ถ• ์œ„์— ์žˆ์œผ๋ฏ€๋กœ $\\displaystyle a = -6$.", "๊ผญ์ง“์  ์ขŒํ‘œ๋Š” $\\displaystyle (-2, 0)$", "$(-2,0)$" ]
HW
[ "$(a,-1) \\rightarrow(1,-a) \\rightarrow(-1,-a+1)=(-1, b)$", "$\\therefore a+b=1$", "$1$" ]
HW
[ "$\\displaystyle (a,2)$์™€ $\\displaystyle (-1,b)$์˜ ์ค‘์ ์€ $\\displaystyle (4,-4)$ ์ด๋ฏ€๋กœ", "$\\frac{a-1}{2}=4 . \\quad \\frac{b+2}{2}=-4 .$", "$a=9, \\quad b=-10$", "$a b=-90$", "$-90$" ]
HW
[ "์›์˜ ์ค‘์‹ฌ์ด $(-3,-3)$ ์ด๋ฏ€๋กœ $x$์ถ•์— ๋Œ€ํ•ด ๋Œ€์นญ์ด๋™ ", "ํ•˜๋ฉด $\\displaystyle ( -3,3 ) $์ด ๋œ๋‹ค. ๋”ฐ๋ผ์„œ $\\displaystyle { ( x+3 ) }^{2}+{ ( y-3 ) }^{2} = 5$", "์ด๋‹ค.", "$(x+3)^{2}+(y-3)^{2}=5$" ]
HW
[ "$P(0, a)$", "์  $B$๋ฅผ $y$์ถ• ๋Œ€์นญ์ด๋™ ํ–ˆ์„ ๋•Œ์˜ ์ ์€ $B'$", "$\\displaystyle ( -1,4 ) $ ์  $\\displaystyle A,B'$ ๋ฅผ ์ง€๋‚˜๋Š” ์ง์„ ์˜", "๋ฐฉ์ •์‹ $\\displaystyle y=-x+3$", "$\\displaystyle P$๋Š” $\\displaystyle y$์ถ• ์œ„์˜ ์ ์ด๋ฏ€๋กœ $\\displaystyle (0,3)$", "$P(0,3)$" ]
HW
[ "์  $\\displaystyle A(5,3)$์„ $\\displaystyle x$์ถ• ์ชฝ์œผ๋กœ $a$ ๋งŒํผ, $y$์ถ• ์ชฝ์œผ๋กœ $-5$ ๋งŒํผ", "ํ‰ํ–‰์ด๋™ํ•œ ์  $\\displaystyle B(5+a,-2)$์— ๋Œ€ํ•ด", "$\\overline{OA}=\\sqrt{5^{2}+3^{2}}=\\sqrt{34}$", "$\\overline{O B}=\\sqrt{(5+a)^{2}+(-2)^{2}}=3 \\sqrt{34}$", "์ด๋ฏ€๋กœ $(a+5)^{2}+4=306$์ด๋‹ค. ๋”ฐ๋ผ์„œ", "$(a+5)^{2}=302$", "$a=\\sqrt{302}-5(\\because a>0)$", "์ด๋‹ค.", "$\\sqrt{302}-5$" ]
HW
[ "$x \\rightarrow x-2,\\quad y \\rightarrow y-m$", "$\\displaystyle y-m = x-4 \\; \\gets ( 0,3 ) $ ์ง€๋‚จ", "$3-m=0-4, \\quad m=7$", "$x \\rightarrow x-7$", "$\\displaystyle y=-(x-n)+1 \\; \\leftarrow (0,3)$ ์ง€๋‚จ", "$3=-(-n)+1, \\quad n=2$", "$m \\times n=7 \\times 2=14$", "$14$" ]
HW
[ "$(3,-1)$์—์„œ $(-3,2)$๋กœ ํ‰ํ–‰์ด๋™์ด ๋˜๋ ค๋ฉด", "$\\displaystyle x$์ถ• ๋ฐฉํ–ฅ์œผ๋กœ $\\displaystyle -6,y$์ถ• ๋ฐฉํ–ฅ์œผ๋กœ $\\displaystyle 3$๋งŒํผ ์ด๋™ํ•ด์•ผ ํ•œ๋‹ค. ๋”ฐ๋ผ์„œ", "$\\displaystyle (2,6) \\to (-4,9)$๋กœ ์ด๋™ํ•œ๋‹ค.", "$(-4,9)$" ]
HW
[ "$x^{2}+y^{2}-6 x+8 y+2=0$", "$(x-3)^{2}+(y+4)^{2}+2-9-16=0$", "$(x-3)^{2}+(y+4)^{2}=23$", "์ด๋ฏ€๋กœ $\\displaystyle a=-3,b=4,c=23$์œผ๋กœ $\\displaystyle a+b+c=24$์ด๋‹ค.", "$24$" ]
HW
[ "$\\sqrt{(5-1)^{2}+(7-10)^{2}}=16+9=\\sqrt{25}=5$", "$\\displaystyle \\overline{\\text{AP}}+\\overline{\\text{BP}}$์˜ ์ตœ์†Ÿ๊ฐ’์€ $\\displaystyle 5$์ด๋‹ค", "$5$ !!" ]
HW
[ "$\\displaystyle \\overline{\\text{O\\text{A}}}=\\sqrt{{5}^{2}+{3}^{2}}=\\sqrt{34}$ ์ด๋ฏ€๋กœ, ์˜ฎ๊ฒจ์ง„ ์  $\\displaystyle A'(5+a,$", "$\\displaystyle -3$)์— ๋Œ€ํ•ด", "$\\overline{O A}^{2}=(5+a)^{2}+9=(3 \\sqrt{34})^{2}=306$", "$(5+a)^{2}=297$", "$a=-5+\\sqrt{33}(\\because a>0)$", "์ด๋‹ค.", "$-5+\\sqrt{33}$" ]
HW
[ "$P$", "$\\sqrt{1+4}=\\sqrt{5}$", "ok", "good.", "$\\sqrt{5}$" ]
HW
[ "$\\displaystyle \\overline{\\text{OA}}=\\sqrt{{5}^{2}+{2}^{2}}=\\sqrt{29}$ ์ด๋ฏ€๋กœ, ์˜ฎ๊ฒจ์ง„ ์ ์„ $\\displaystyle A'$๋ผ๊ณ ", "ํ•˜๋ฉด $\\displaystyle \\text{A}^\\prime (5+a,-2)$์— ๋Œ€ํ•ด $\\displaystyle \\overline{\\text{OA}'}=3\\sqrt{29}$์ด๋‹ค. ๋”ฐ๋ผ์„œ", "$(5+a)^{2}+4=261 \\rightarrow 5+a=\\sqrt{257}(\\because a>0$", "$a=-5+\\sqrt{257}$", "์ด๋‹ค.", "$-5+\\sqrt{257}$" ]
HW
[ "$y=-x$์— ๋Œ€์นญ์ด๋™ํ•˜๋ฉด", "$\\displaystyle x$ ๋Œ€์‹  $\\displaystyle -y$, $\\displaystyle y$ ๋Œ€์‹  $\\displaystyle -x$๋ฅผ ๋Œ€์ž…ํ•œ๋‹ค.", "$(-1,-9)$", "$(-1,-9)$" ]
HW
[ "P์˜ ์ขŒํ‘œ๋Š” $\\displaystyle (2,4)$์ด๊ณ ", "$\\displaystyle Q$์˜ ์ขŒํ‘œ๋Š” $\\displaystyle (-4,2)$์ด๋‹ค.", "$\\overline{PQ}=\\sqrt{(2+4)^{2}+(4-2)^{2}}=\\sqrt{40}$", "$\\sqrt{40}$" ]
HW
[ "x ๋ฐฉํ–ฅ $\\displaystyle -4 \\; \\; : \\; \\; \\; x \\to x+4$", "$\\displaystyle y$๋ฐฉํ–ฅ $\\displaystyle 2$ : $\\displaystyle y \\to y-2$", "$y-2=-(x+4)^{2}+3(x+4)+2$", "$y=-x^{2}-8 x-16+3 x+12+2+2$", "$=-x^{2}-5 x$", "$y=-x^{2}=5 x$" ]
HW
[ "$y=\\left(x^{2}+4 x+4\\right)-9=(x+2)^{2}-9$", "$x \\rightarrow x+y$", "$y\\rightarrow y-3$", "$y-3=(x+6)^{2}-9$", "$y=(x+6)^{2}-6$", "$(a, b)=(-6,-6)$", "$a-b=0$", "$0$" ]
HW
[ "$x$์ถ• ๋Œ€์นญ์€ $y$์ขŒํ‘œ์˜ ๋ถ€ํ˜ธ๋ฅผ ๋ฐ˜๋Œ€๋กœํ•˜๋ฏ€๋กœ", "$(0,5) \\rightarrow(0,-5)$", "์ด๋‹ค.", "$(0,-5)$" ]
HW
[ "์ด๋™๋œ ์›์˜ ์ค‘์‹ฌ์ด $\\displaystyle (4,a)$์ด๋ฏ€๋กœ", "$\\frac{|12+2 a-7|}{\\sqrt{3^{2}+2^{2}}}=\\sqrt{13} \\Rightarrow|12+2 a-7|=13$", "$ 2a=8$ ๋˜๋Š” $ 2a=-18$", "$a=4(\\because a>0)$", "์ด๋‹ค.", "$4$" ]
HW
[ "$\\displaystyle (a,2)$์™€ $\\displaystyle (-2,b)$์˜ ์ค‘์ ์ด $\\displaystyle (5,-1)$์ด๋ฏ€๋กœ", "$\\frac{a-2}{2}=\\frac{1}{5}, \\quad \\frac{b+2}{2}=-1$", "$a-2=10 \\quad b+2=-2$", "$a=12 \\quad b=-4$", "$a b=-48$", "$-48$." ]
HW
[ "$(2,0) \\rightarrow (-4,4)$๋Š” $x$์ถ• ๋ฐฉํ–ฅ์œผ๋กœ $-6$, $y$์ถ• ๋ฐฉํ–ฅ์œผ๋กœ", "$\\displaystyle 4$๋งŒํผ ํ‰ํ–‰์ด๋™ํ•˜๋Š” ๊ฒƒ์ด๋ฏ€๋กœ $\\displaystyle (2,6)$ ์€ $\\displaystyle (-4,10)$์œผ๋กœ ์˜ฎ๊ฒจ", "์ง„๋‹ค.", "$(-4,10)$" ]
HW
[ "$(x-1)^{2}+(y-1)^{2}=-a+2$", "$(x+a)^{2}+(y-5)^{2}=-a+2$", "ok", "ํ‰ํ–‰์ด๋™", "์›์˜ ์ค‘์‹ฌ $\\displaystyle ( -4,5 ) = ( b,5 ) $", "$b=-4,\\quad -a+2=4 \\quad a=-2$", "$\\displaystyle a+b=-6$", "$-6$" ]
HW
[ "$(6,-3)$", "$P(6,3)$", "$Q(-3,6)$", "$\\sqrt{(6+3)^{2}+(3-6)^{2}}=\\sqrt{81+9}=3 \\sqrt{10}$", "$3\\sqrt{10}$" ]
HW
[ "์  $(-7, 5)$๋ฅผ $y=x$ ๋Œ€์นญ์ด๋™ํ•˜๋ฉด $(5,-7)$์ด๋‹ค. ์ดํ›„", "์›์  ๋Œ€์นญํ•˜๋ฉด $\\displaystyle (-5,7)$์ด ๋œ๋‹ค. ์ด๋Š” $\\displaystyle y = -x$ ๋Œ€์นญ๊ณผ ๊ฐ™๋‹ค.", "๋”ฐ๋ผ์„œ $3x+2y-3=0$์„ $y=-x$์— ๋Œ€ํ•ด ๋Œ€์นญ์ด๋™ํ•˜๋ฉด", "$3(-y)+2(-x)-3=0$", "$2 x+3 y+3=0$", "์ด๋‹ค.", "$2 x+3 y+3=0$" ]
HW
[ "์ง์„  $\\displaystyle 2x+2y+k=0$์„ ์›์ ์— ๋Œ€ํ•ด ๋Œ€์นญ์ด๋™ํ•˜๋ฉด", "$2(-x)+2(-y)+k=0$", "$2 x+2 y-k=0$", "์ด๋‹ค. ํ•œํŽธ ์› $\\displaystyle {(x-5)}^{2}+{(y-1)}^{2}=4$์˜ ์ค‘์‹ฌ์˜ ์ขŒํ‘œ๋Š”", "$(5,1),$ ๋ฐ˜์ง€๋ฆ„์€ $2$์ด๋ฏ€๋กœ,", "$\\frac{|2 \\times 5+2 \\times 1-k|}{\\sqrt{2^{2}+2^{2}}}=2$", " $|12-k|=4 \\sqrt{2}$", "$k=12 \\pm 4 \\sqrt{2}$", "์ด๋‹ค. ๋”ฐ๋ผ์„œ $\\displaystyle (12+4\\sqrt{2})+(12-4\\sqrt{2)}=24$์ด๋‹ค.", "24" ]
HW
[ "์–ด๋–ค ์ง์„ ์€ $\\displaystyle (-4,4)$๋ฅผ ์ง€๋‚˜๋ฏ€๋กœ", "$ y = -x$ ์— ๋Œ€ํ•œ ๋Œ€์นญ์ด๋™์ด๋‹ค.", "๋ ๋ผ์„œ, $\\displaystyle x$๋Œ€์‹  $\\displaystyle -y$, $\\displaystyle y$๋Œ€์‹  $\\displaystyle -x$๋ฅผ", "๋Œ€์ž…ํ•˜๋ฉด", "$-3 y-3 x-4=0$", "$3 x+3 y+4=0$" ]
HW
[ "$\\displaystyle y = 5 {x}^{2}+5 x+1$ ์ด $\\displaystyle y = -x $์— ๋Œ€ํ•˜์—ฌ ๋Œ€์นญ์ด๋™ํ•œ ๋„ํ˜•์˜ ", "๋ฐฉ์ •์‹์€ $\\displaystyle -x=-5 {y}^{2}-5 y+1$", "$\\displaystyle x=5 {y}^{2}+5 y-1$ ์ด๋‹ค.", "์™œ๋ƒํ•˜๋ฉด $\\displaystyle y=-x$์— ๋Œ€์นญ์ด๋™ํ•˜๋ฉด $\\displaystyle (x,y) \\to (-y,-x)$๊ฐ€", "๋˜๊ธฐ ๋•Œ๋ฌธ์ด๋‹ค. ", "$y=5 y^{2}+5 y-1$" ]
HW
[ "$\\displaystyle x$์ถ•์œผ๋กœ $\\displaystyle -2, \\; y$์ถ•์œผ๋กœ $\\displaystyle 3$๋งŒํผ ํ‰ํ–‰์ด๋™ํ•˜๋ฉด,", "$y-3=-(x+2)^{2}+4(x+2)-1$", "$y=-x^{2}+6$", "$y=-x^{2}+6$" ]
HW
[ "์›์„ ๋Œ€์นญ์ด๋™ํ•˜๋ฉด ๋ฐ˜์ง€๋ฆ„์€ ๊ทธ๋Œ€๋กœ์ด๋˜ ์ค‘์‹ฌ์˜ ์ขŒํ‘œ๋งŒ", "๋ฐ”๋€Œ๋ฏ€๋กœ, ์ค‘์‹ฌ์˜ ์ขŒํ‘œ๊ฐ€ $(-2,4)$์ด๊ณ  ๋ฐ˜์ง€๋ฆ„์ด $k$์ธ ์›์ด", "์›์„ ๋Œ€์นญ์ด๋™ํ•˜๋ฉด ๋ฐ˜์ง€๋ฆ„์€ ๊ทธ๋Œ€๋กœ์ด๋˜ ์ค‘์‹ฌ์˜ ์ขŒํ‘œ๋งŒ ๋ฐ”๋€Œ๋ฏ€๋กœ, ์ค‘์‹ฌ์˜ ์ขŒํ‘œ๊ฐ€ $\\displaystyle (-2, 4)$์ด๊ณ  ๋ฐ˜์ง€๋ฆ„์ด $\\displaystyle k$์ธ ์›์ด ๋œ๋‹ค. ๋”ฐ๋ผ์„œ\n$\\displaystyle {(x+2)}^{2}+{(y-4)}^{2}={k}^{2}$\n์ธ๋ฐ, ์ด ์›์ด ์  $\\displaystyle (-2, -5)$๋ฅผ ์ง€๋‚˜๋ฏ€๋กœ\n$\\displaystyle {0}^{2}+{(-9)}^{2}={k}^{2}$\n\n$\\displaystyle \\Rightarrow k=9$ ์ด๋‹ค.\n\n$\\displaystyle \\therefore k = 9$", "$(x+2)^{2}+(y-4)^{2}=k^{2}$", "์ธ๋ฐ, ์ด ์›์ด ์  $\\displaystyle ( -2,-5 ) $๋ฅผ ์ง€๋‚˜๋ฏ€๋กœ", "$0^{2}+(-9)^{2}=k^{2}$", "$k=q$", "์ด๋‹ค.", "9" ]
HW
[ "$\\displaystyle x$์ถ•", "$(18,10)$", "๋Œ€์นญ์ด๋™", "$(18,-10)$", "$(18,-10)$" ]
HW
[ "$\\displaystyle {x}^{2}+{y}^{2}-2x-2y+a=0$ ์ด๋ฏ€๋กœ", "$(x-1)^2+(y-1)^2+a-2=0$์ด๋‹ค. ๋”ฐ๋ผ์„œ ์›์˜", "์ค‘์‹ฌ์€ $\\displaystyle (1,1)$์—์„œ $\\displaystyle (-2,4)$๋กœ ์˜ฎ๊ฒจ์ง€๋ฏ€๋กœ", "$2-a=25 \\rightarrow a=-23$", "$b=-2$", "์ด๋ฏ€๋กœ $\\displaystyle a+b=-25$์ด๋‹ค.", "$-25$" ]
HW
[ "$\\displaystyle y$๋Œ€์‹  $\\displaystyle -y$๋ฅผ ๋Œ€์ž…ํ•˜๋ฉด,", "$-6 y=6 x^{2}-x+1$", "$y=-x^{2}+\\frac{1}{6} x-\\frac{1}{6}$", "$y=-x^{2}+\\frac{1}{6} x-\\frac{1}{6}$" ]
HW
[ "$a=-8, \\quad 8=-1$", "๊ทธ๋ž˜ํ”„๋ฅผ ๊ทธ๋ ค๋ณด๋ฉด ์˜ˆ์ƒ์ด ์กฐ๊ธˆ ๋ ๊นŒ์š”?", "$\\displaystyle x$์™€ $\\displaystyle y$ ๊ฐ’์ด ๋ฐ˜๋Œ€๋กœ ๊ฐ์„", "์•Œ ์ˆ˜ ์žˆ์„๊นŒ์š”?" ]
HW
[ "$4 x+y-6=0$", "$4(x+5)+(y-4)-6=0$", "$4 x+y+10=0$", "์ด๋ฏ€๋กœ $p=1$, $q=10$์œผ๋กœ $p+q = 11$์ด๋‹ค.", "11" ]
HW
[ "$(a, 2) \\quad(-1, b)$", "$\\frac{a-1}{2}=2, a-1=4, a=5 .$", "$\\frac{2+b}{2}=-5,2+b=-10, b=-12$", "$a \\times b=5 \\times(-12)=60$", "$-60$" ]
HW
[ "์› $\\displaystyle {(x+1)}^{2}+{(y+5)}^{2}=1$์˜ ์ค‘์‹ฌ์€ $\\displaystyle (-1,-5)$์ด๋ฏ€๋กœ", "$\\displaystyle x$์ถ•์— ๋Œ€ํ•ด ๋Œ€์นญ์ด๋™ํ•˜๋ฉด $\\displaystyle (-1,5)$์ด๋‹ค. ๋”ฐ๋ผ์„œ", "$(x+1)^{2}+(y-5)^{2}=1$", "์ด๋‹ค.", "$(x+1)^{2}+(y-5)^{2}=1$" ]
HW
[ "$y=(x-4)-2+m$", "$ y=-(x-n)+1 \\quad $์˜ ๊ต์ ์ด $ (0,3)$์ด๋ฏ€๋กœ", "$3=-3+m, m=6$", "$3=n+1 \\quad n=2$ .", "$mn=12$", "$12$" ]
HW
[ "์  $\\displaystyle A(4,-1)$์„ $\\displaystyle x$์ถ• ๋ฐฉํ–ฅ์œผ๋กœ $\\displaystyle a$, $\\displaystyle y$์ถ• ๋ฐฉํ–ฅ์œผ๋กœ $\\displaystyle -6$๋งŒํผ", "ํ‰ํ–‰์ด๋™ํ•œ ์  $\\displaystyle \\text{A}' ( 4+a, -7 ) $์— ๋Œ€ํ•ด", "$\\overline{O A}=\\sqrt{4^{2}+1^{2}}=\\sqrt{17}$", "์ด๋ฏ€๋กœ $\\displaystyle \\overline{OA'}=3\\sqrt{17}$์ด๋‹ค. ๋”ฐ๋ผ์„œ", "$(a+4)^{2}+49=9 \\times 17=153$", "$(a+4)^{2}=104$", "$a+4=2 \\sqrt{26}(\\because a>0)$", "$a=2 \\sqrt{26}-4$", "์ด๋‹ค.", "$2 \\sqrt{26}-4$" ]
HW
[ "$2 X-2 B=2 A+4 B$", "$5.$", "$X=A+3 B$", "์ •๋ฆฌ good!", "$=7x^{2}+xy+6 y^{2}+3(-3x^{2}+5xy $", "$\\left.+6 4^{2}\\right)$", "$=-2 x^{2}+16 x y+24 y^{2}$", "๊ณ„์‚ฐ ์ž˜ ํ•˜์…จ์–ด์š”!" ]
HW
[ "โ‘ซ $x^{4}+5x^{3}+11x^{2}+15x+9=A\\left(x^{2}+3x+4\\right)+4x+5$", "$x^{4}+5 x^{3}+11 x^{2}+11 x+4=A\\left(x^{2}+3 x+4\\right) .$", "$A=x^{2}+2 x+1$" ]
HW
[ "๋ฌธ์ œ $\\displaystyle 3$", "Good!!", "$5 x-5 x^{2}-2+17 x^{3}$", "$17 x^{3}-5 x^{2}+5 x-2$", "๋‹ต:$\\displaystyle 17{x}^{3}-5{x}^{2}+5x-2$" ]
HW
[ "๋ฌธ์ œ $\\displaystyle 7$", "perfect!!", "$(3 x-2)(3 x+2)\\left(3^2 x^{2}+2^{2}\\right)\\left(3^{4} x^{4}+2^{4}\\right)=\\left(3^{2} x^{2}-2^{2}\\right)\\left(3^2 x^2+2^{2}\\right)\\left(3^4 x^{4}+2^{4}\\right)=\\left(3^4x^4-2^4\\right)\\left(3^{4} x^{4}+2^{4}\\right)=$", "$\\displaystyle ({3}^{2}{x}^{2}-{2}^{3})={3}^{9}-{2}^{8}=19683-19427$ ๋‹ต:$\\displaystyle 19+27$" ]
HW
[ "์‹์˜ ๊ณ„์ˆ˜๋ฅผ ๊ผผ๊ผผํžˆ ๋ด…์‹œ๋‹ค.", "49. โ‘  $-16ab(4a+4b-4c)$", "$=-64 a^{2} b-64 a b^{2}+64 a b c$", "โ‘ก $\\displaystyle {(4 a)}^{3}+{(4 b)}^{3}+{(-4 c)}^{3}-3(-64 a b c)$", "$=64 a^{3}+64 b^{3}-64 c^{3}+192 a b c$", "$\\text{โ‘ }+\\text{โ‘ก} = 64 a^3 + 64b^3 - 64c^3 - 64a^2b$", "$-64 a b^{2}+236 a b c$" ]
HW
[ "$x^{3}+\\frac{1}{x^{3}}=\\left(x+\\frac{1}{x}\\right)^{3}-3\\left(x+\\frac{1}{x}\\right)$", "$x^{2}+\\frac{1}{x^{2}}=\\left(x+\\frac{1}{x}\\right)^{2}-2=12$", "$\\left(x+\\frac{1}{x}\\right)^{2}=14, ~~x+\\frac{1}{x}=\\sqrt{14} .$", "$x^{3}+\\frac{1}{x^{3}}=14 \\sqrt{14}-3 \\sqrt{14}$", "Perfect!!", "$=11 \\sqrt{14}$", "$11 \\sqrt{14}$" ]
HW
[ "ใŠท", "$x^{3}-9 x^{2}+20 x-12$", "Good!" ]
HW
[ "6. $(a-b)^{2}=a^{2}-2 a b+b^{2}$", "$=a^{2}+2 a b+b^{2}-4 a b$", "good", "$=(a+b)^{2}-4 a b$", "$=16+40=56$", "์ž˜ ์ •๋ฆฌํ•˜์˜€์Šต ๋‹ˆ๋‹ค!" ]
HW
[ "good.", "9. $\\displaystyle {x}^{3}-{y}^{3}=(x-y)({x}^{2}+xy+{y}^{2})$", "$=2 \\sqrt{7}\\left\\{(3+\\sqrt{7})^{2}+2+(3-\\sqrt{7})^{2}\\right\\}$", "$=2 \\sqrt{7} \\times 34$", "$=68 \\sqrt{7}$" ]
HW
[ "$8$. $\\displaystyle x^{3} + \\frac{1}{x^3} = {\\left(x+\\frac{1}{x}\\right)}^3 - 3 \\left(x+\\frac{1}{x}\\right)$", "good!", "$=27-9$", "$=18$" ]
HW
[ "$x^{3}-y^{3}=(x-y)^{3}+3 x y(x-y)$", "$x-y=5+\\sqrt{7}-(5-\\sqrt{7})=2 \\sqrt{7}$", "$x y=(5+\\sqrt{7})(5-\\sqrt{7})=25-7=18$", "$=(2 \\sqrt{7})^{3}+3 \\cdot 18 \\cdot 2 \\sqrt{7}$", "$=56 \\sqrt{7}+108 \\sqrt{7}$", "$=164 \\sqrt{7}$", "์ž˜ํ–ˆ์–ด์š”~!", "$164 \\sqrt{7}$" ]
HW
[ "20. $A \\ast B = 9A - 9B$", "$9\\left(x^{2}+2 x+9y+1\\right)-9(-2 x-y-8)$", "$=9 x^{2}+18 x+81y+9+18 x+9y+72$", "$=9 x^{2}+36 x+90y+81$", "์ž˜ ๊ณ„์‚ฐํ–ˆ์–ด์š”!" ]
HW
[ "$x+y=1, \\quad x y=-3$", "$x^{2}-x y+y^{2}=(x+y)^{2}-3 x y$", "$=1^{2}-3 \\times(-3)$", "$=1+9$", "์ž˜ํ–ˆ์–ด์š”~", "$=10$", "$10$" ]
HW
[ "$\\frac{x^{4}+5 x^{3}+12 x^{2}+20 x+7}{A}$", "$\\doteq x^{2}+3 x+1 \\quad \\cdots \\quad 3 x+2$", "$x^{4}+5 x^{3}+12 x^{2}+20 x+7$", "$=(\\text{๋‚˜๋ˆ„๋Š” ๋‹คํ•ญ์‹}) \\times \\text{๋ชซ} + \\text{๋‚˜๋จธ์ง€}$ .", "์–ด๋–ค ๊ฐœ๋… ์ด์šฉํ•ด์•ผ ํ•˜๋Š”์ง€", "๋ชจ๋ฅด๊ฒ ์–ด์š”", "๋‹ค์‹œ ํ•œ ๋ฒˆ ํ’€์–ด ๋ณด์„ธ์š” ." ]
HW
[ "45. $ (x-y)^{2}=x^{2}-2 x y+{y}^{2}$์—์„œ", "$16=8-2 x y$", ": ๋Œ€์ž… ์ž˜ ํ–ˆ์–ด์š”.", "$x y=-4$", "$x^{3}-y^{3}=(x-y)\\left(x^{2}+x y+y^{2}\\right)$", "$=-4(8-4)$", "$=-16$" ]
HW
[ "$P(x)=\\left(x^{2}-2 x+1\\right)(x-2)-3 x+6$", "$=x^{3}-2 x^{2}-2 x^{2}-4 x+x-2-3 x+6$", "$$", "$=x^{3}-4 x^{2}-6 x+4$", "$=x^{3}-4 x^{2}+2 x+4$", "$x^{3}-4 x^{2}-6 x+4$" ]
HW
[ "Good!\n", "๋ฌธ์ œ $\\displaystyle 6$", "$=\\frac{(1+5)(1-5)\\left(1^{2}+5^{2}\\right)\\left(1^{4}+5^{4}\\right)}{4}=\\frac{\\left(1^{2}-5^{2}\\right)\\left(1^{2}+5^{2}\\right)\\left(1^{4}+5^{4}\\right)}{4}=\\frac{\\left(1^{4}-5^{4}\\right)(1^4+5^4)}{4}= \\frac{\\left(1^{8}-5^{8}\\right)}{4}=-\\frac{\\left(5^{8}-1^{8}\\right)}{4}$", "perfect!", "๋‹ต: $97656$", "$=\\frac{390625-1}{4}=\\frac{390624}{4} =97656$" ]
HW
[ "3)", "$(x-y)^{2}=x^{2}-2 x y+y^{2}$", "$1=9-2 x y$", "$\\therefore x y=4$", "$(x-y)^{3}=x^{3}-y^{3}-3 x y(x-y)$", "$1=x^{3}-y^{3}-12$", "$\\therefore x^{3}-y^{3}=13$" ]
HW
[ "$c-a=-(a-b+b-c)=-5$", "$a^{2}+b^{2}+c^{2}-a b-b c-c a=$", "$\\frac{1}{2}\\left\\{(a-b)^{2}+(b-c)^{2}+(c-a)^{2}\\right\\}$", "$=\\frac{1}{2}\\left\\{9+4+(-5)^{2}\\right\\}$", "$=\\frac{1}{2}\\{9+4+25\\}$", "Perfect!!", "$=\\frac{1}{2} \\times 38$", "$=19$", "$19$" ]
HW
[ "$x+y=-7, \\quad xy=7$", "$x^{2}-x y+y^{2}=(x+y)^{2}-3 x y$", "$x^{2}-x y+y^{2}=49-21=28$", "Good !", "$28$" ]
HW
[ "๋‚ด๋ฆผ์ฐจ์ˆœ$\\displaystyle \\to $์ฐจ์ˆ˜๊ฐ€ ํฐ ํ•ญ๋ถ€ํ„ฐ.", "$7 x^{3}-8 x^{2}+7 x-4$", "good!", "$7 x^{3}-8 x^{2}+7 x-4$" ]
HW
[ "$7 x-8 x^{2}-5+14 x^{3}=14 x^{3}-8 x^{2}+7 x-5$", "$14 x^{3}-8 x^{2}+7 x-5$" ]
HW
[ "$\\left(x^{2}+y\\right)^{2}(x-y)+x^{2} y-x y^{2}$", "$8 \\times(-6)$" ]
HW
[ "1) $a+b+c=0$", "$2>\\quad a^{2}+b^{2}+c^{2}=10$", "$(a+b+c)^{2}=a^{2}+b^{2}+c^{2}+2(a b+b c+(a)$", "$a^{2}+b^{2}+c^{2}=(a+b+c)^{2}-2(a b+b c+c a)$", "$-\\frac{1}{2}(10\\quad =-2(a b+b c+c a))$", "$-5=a b+b c+c a$", "$a^{4}+b^{4}+c^{4}=\\left(a^{2}+b^{2}+c^{2}\\right)^{2}$", "$=10^{2}$", "$=100$", "๋‹ต$\\displaystyle :100$" ]
HW
[ "$\\left(4 a^{2}+25 b^{2}+c^{2}+10 a b+5 b c+2 a c\\right)$", "$\\left(4 a^{2}+25 b^{2}+c^{2}+5 b c-10 a b-2 a c\\right)$", "$\\left(4 a^{2}+25 b^{2}+c^{2}-10 a b-5 b c+2 a c\\right)$", "$\\left(4 a^{2}+25 b^{2}+c^{2}+10 a b-5 b c-2 a c\\right)$", "$=16 a^{2}+100 b^{2}+4 c^{2}$", "์ข‹์•„์š”! ์ข‹์€ ํ’€์ด์—์š”!", "$16 a^{2}+100 b^{2}+4 c^{2}$" ]
HW
[ "๋ฌธ์ œ $\\displaystyle 1$", "$5 x+2\\left(2 x^{2}-x y+4 y^{2}\\right)=-3\\left(3 x-2 x y+6 y^{2}\\right)$", "Perfect!!", "$5 x+4 x^{2}-2x y+8 y^{2}=-9 x^{2}+6 x y-18 y^{2}$", "$5 x=-13 x^{2}+8 x y-26 y^{2}$", "$x=\\frac{-13}{5} x^2+\\frac{8}{5} x y-\\frac{26}{5} y^{2} \\quad$ ๋‹ต $: \\frac{-13}{5} x^{2}+\\frac{8}{5} x y-\\frac{26}{5} y^{2}$" ]
HW
[ "$(3 x+2) \\times(3 x+2)$", "$(a+b)^{2}=a^{2}+2 a b+b^{2}$", "$9 x^{2}+12 x+4$", "์ข‹์•„์š”!", "์ข‹์€ ํ’€์ด์—์š”!", "$9 x^{2}+12 x+4$" ]
HW
[ "Hi my name is yundo!", "$81 a^{2}+45 a-45 a$", "good!", "$81 a^{2}-25$" ]
HW
[ "๋ฌธ์ œ $\\displaystyle 4$", "$\\displaystyle (9x+3)(x-8)$์„ ๋ถ„๋ฐฐ๋ฒ•์น™์„ ์ด์šฉํ•˜์—ฌ ํ’€๋ฉด $\\displaystyle 9{x}^{2}+(-72+3)x-24 \\; , \\; 9{x}^{2}-69x-24$์ด๋‹ค.", "Perfect!!", "๋‹ต: $\\displaystyle 9{x}^{2}-69x-24$" ]
HW
[ "46. $\\displaystyle (6 a+2 b-2 c)(36 {a}^{2}+4 {b}^{2}+4 {c}^{2}-12 a b$", "$4 b c+12 a c)=216 a^{2}+8 b^{2}-8 c^{2}$", "$\\displaystyle +72abc$ ์—์„œ", "$-12 a b(6 a+2 b-2 c)$", "$=-72 a^{2} b-24 a b^{2}+24 a b c$", "$\\therefore 216 a^{2}+8 b^{2}-8 c^{2}-72 a^{2} b-24 a b^{2}+$", "$96 a b c$", "๋ฌธ์ œ๋ฅผ ์ž˜ ๋ชป ๋ณด์…จ์Šต๋‹ˆ๋‹ค." ]
HW
[ "$A-2 A+2 B+C$", "$=-A+2 B+C$", "$=-\\left(2 x^{3}+8 x^{2}+3 x+4\\right)$", "$2\\left(-7 x^{2}+x-2\\right)$", "$-x^{3}+3 x^{2}-4 x-1$", "$=-2 x^{3}-8 x^{2}-3 x-4$", "๋๊นŒ์ง€ ๊ณ„์‚ฐํ•ด๋ด์š”!", "$-14 x^{2}+2 x-4$" ]
HW
[ "$\\left(2 x^{2}-x-8\\right)\\left(x^{2}-2 x+k\\right)$", "$\\displaystyle x$์˜ ๊ณ„์ˆ˜ $\\displaystyle : -k + 16 = 6$", "$\\therefore k=10$", "Good!", "$10$" ]
HW
[ "ใŠต", "$-35 a b-2 a b=-37 a b$", "$-37$", "Good!" ]
HW
[ "$(7x+3)(4x-5)=28x^{2}+(-35+12)x-15$", "$28x^2 + (-35+12)x-15$", "Perfect!", "$28x^{2}-23 x-15$" ]
HW
[ "๋‹คํ•ญ์‹ $\\displaystyle 10 x-3 {x}^{2}-17+4 {x}^{3}$ ์„", "$\\displaystyle x$์— ๋Œ€ํ•œ ์˜ค๋ฆ„ ์ฐจ์ˆœ์œผ๋กœ ์ •๋ฆฌํ•˜์‹œ์˜ค", "$4 x^{3}-3 x^{2}+10 x-17$", "์šฉ์–ด ๋•Œ๋ฌธ์— ํ–‡๊ฐˆ๋ ธ๋˜ ๊ฒƒ ๊ฐ™์•„์š”!", "$4 x^{3}-3 x^{2}+10 x-17$" ]
HW
[ "$(x-3)(x+3)(x-8)$", "$\\left(x^{2}-9\\right)(x-8)$", "$x^{3}-8 x^{2}-9 x+7=$", "์ž˜ํ–ˆ์–ด์š”!", "$a-b =$", "$x^{3}-8 x^{2}-9 x+72$" ]
HW
[ "$-k x+36 x=2$", "$k=34$", "์ข‹์•„์š”! ์ข‹์€ ํ’€์ด์—์š”.", "$34$" ]
HW
[ "$-5\\left(x^{2}+2 x-54+1\\right)+5(3 x-y+6)$", "$-5 x^{2}-10 x+254-5+15 x-54+30$", "$=-5 x^{2}+5 x+209+25$", "์ข‹์•„์š”,์ข‹์€ ํ’€์ด์—์š”.", "$-5 x^{2}+5 x+20y+25$" ]
HW
[ "42. $\\displaystyle {x}^{2}+5 x-1=0$", "์ •๋ฆฌ ์ž˜ ํ–ˆ์Šต๋‹ˆ๋‹ค.", "$x-\\frac{1}{x}=-5$", "$x^{3}-\\frac{1}{x^{3}}=\\left(x-\\frac{1}{x}\\right)^{3}+3\\left(x-\\frac{1}{x}\\right)$", "$=-125-15$", "$=-140$" ]
HW
[ "$7 x-2 x^{2}-15+5 x^{3}$", "$-15+7 x-2 x^{2}+5 x^{3}$", "์ž˜ํ–ˆ์–ด์š”!", "$-15+7x-2 x^{2}+5 x^{3}$" ]
HW
[ "$\\left(x^{2}+y^{2}\\right)(x-y)=x^{3}-y^{3}$", "$6 \\times 5=30$", "๋‹ค์‹œ ํ•œ ๋ฒˆ ํ’€์–ด๋ณผ๋ž˜์š”?", "์•Œ๊ณ  ์žˆ๋Š” ๊ณต์‹์„ ํ™œ์šฉํ•ด ๋ด์š”.", "$30$" ]
HW
[ "$(-x-1)(-x-2)(-x-3) \\cdots(-x-10)$", "12.", "$\\displaystyle x^9$์˜ ๊ณ„์ˆ˜:$\\displaystyle 1+2+3 \\cdots +10\n$", "$=11 \\times 5=55$", "์ž˜ ๊ณ„์‚ฐํ–ˆ์–ด์š”!" ]
HW
[ "$x+y=-9 \\quad x y=7 $", "$x^{2}-x y+y^{2}=(x-y)^{2}+x y$", "$=81+7$", "$=88$" ]
HW
[ "$10x-{x}^{2}-16+3 {x}^{3}$์„ ์˜ค๋ฆ„์ฐจ์ˆœ์œผ๋กœ ์ •๋ฆฌ", "์˜๋ฏธ๋ฅผ ๋‹ค์‹œ", "$3 x^{3}-x^{2}+10 x-16$", "์ƒ๊ฐํ•ด๋ณด์„ธ์š”!", "๋‚ด๋ฆผ์ฐจ์ˆœ", "$ 3x^{3}-x^{2}+10x-16$" ]
HW
[ "$\\displaystyle x$์˜ ๊ณ„์ˆ˜๊ฐ€ $\\displaystyle 11$์„ ๋„˜๋Š” ์ˆ˜๋ฅผ ๋นผ๋ฉด", "$\\displaystyle {(1+x+2{x}^{2}+ \\cdots +10{x}^{10})}^{2}$์ด ๋œ๋‹ค.", "๊ทธ์ค‘ $x$์˜ ๊ณ„์ˆ˜๊ฐ€ $10$์ผ ์ˆ˜ ์žˆ๋„๋ก ํ•˜๊ฒŒ ์กฐํ•ฉํ•˜๋ฉด", "$10x^{10}+\\left(9 x^{9} \\times x\\right)+\\left(8 x^{2} \\times 2 x^{8}\\right) \\cdots+\\left(x \\times 9x^{9}\\right) \\times$", "$\\displaystyle 10{x}^{10}$์ด๋‹ค.", "๊ทธ๋Ÿฌ๋ฏ€๋กœ $\\displaystyle (10{x}^{10}+9{x}^{10}+16{x}^{10}+21{x}^{10}+24{x}^{10}+25{x}^{10}+$", "$24 x^{10}+21x^{10}+16 x^{10}+9 x^{10}+10 x^{10})$", "$=185 x^{10}$", "Good!" ]
HW
[ "$x+y=-3$", "$x y=7$", "์‹ ๋ณ€ํ˜•์„ ์•„์ฃผ ์ž˜ํ–ˆ์–ด์š”!", "$x^{2}-x y+y^{2}=(x+y)^{2}-3 x y$", "$9-21=-12$", "$-12$" ]
HW
[ "$(11x+3)(3 x-5)$", "$=33 x^{2}-55 x+9 x-15$", "$=33 x^{2}-46 x-15$", "Good!!", "$33 x^{2}-46 x-15$" ]
HW
[ "$16 x^{2}+40 x+25$", "ํฐ ํŒจ๋“œ", "๊น”๋”", "$16 x^{2}+40 x+25$" ]
HW
[ "$9 a^{2}+12 a b-12 a c$", "$12 a b+16 b^{2}-16 b c$", "$12 a c+16 b c-16 c^{2}$", "$=9 a^{2}+16 b^{2}-16 c^{2}+24 a b$", "์ข‹์•„์š”!", "์ข‹์€ ํ’€์ด์—ฌ์š”." ]
HW
[ "$\\displaystyle x$์ฐจ์ˆ˜: $\\displaystyle 1$ ์ƒ์ˆ˜ $\\displaystyle k$", "$(2 x^{2}-x+2)(x^2-4x+k)= \\cdots -kx-8x,\\quad -k-8=5,\\quad k =-13$", "good!", "$\\therefore k=-13$", "$k=-13$" ]
HW
[ "$\\displaystyle x$์— ๋Œ€ํ•œ ํ•ญ๋“ฑ์‹์ด๋ฏ€๋กœ", "$a=5, b=-2, c=-3 .$", "$a+b+c=0 .$", "$0$" ]
HW
[ "$\\displaystyle P(x)=(x-6)Q(x)+1$ ์ด๋ฏ€๋กœ", "$(x+4) P(x)=(x-6)(x+4) Q(x)+x+4$", "$=(x-6)(x+4) Q(x)+x-6+10$", "$=(x-6)\\{(x+4) Q(x)+1\\}+10$", "์ด๋‹ค. ๋”ฐ๋ผ์„œ ๋‚˜๋จธ์ง€๋Š” $10$์ด๋‹ค." ]
HW
[ "$\\displaystyle x$์— ๋Œ€ํ•œ ํ•ญ๋“ฑ์‹์ด๋ฏ€๋กœ", "$a=4, b=-4, \\quad c=-1 .$", "$a+b+c=-1$", "$-1$" ]
HW
[ "$(x-1)^{54}=x Q(x)+R$", "$\\displaystyle x=0$์„ ๋Œ€์ž…ํ•˜๋ฉด, $\\displaystyle R=1$.", "$\\displaystyle x= \\; 472$๋ฅผ ๋Œ€์ž…ํ•˜๋ฉด,", "$471^{54}=472 Q(472)+1 .$", "$\\displaystyle \\therefore {471}^{54}$๋ฅผ $\\displaystyle 472$๋กœ ๋‚˜๋ˆ„์—ˆ์„ ๋•Œ์˜", "๋‚˜๋จธ์ง€๋Š” $\\displaystyle 1$.", "$1 .$" ]
HW
[ "$P(x)=(x+3) Q(x)+4$", "$Q(x)=(x-2) Q^{\\prime}(x)+5$", "$P(2)=5 \\times Q(2)+4$", "$Q(2)=5$", "$P(2)=25+4=29$", "29" ]
HW
[ "$ k$์— ๊ด€๊ณ„์—†์ด $ x=1$ ์ด๋ฏ€๋กœ ,", "1) $k=5$์ผ ๋•Œ $x^{2}+9_{m+n}+4=0 \\to 9_{m+n} = -5$", "2) $\\displaystyle k = -4$ ์ผ๋•Œ $\\displaystyle {x}^{2}-9x + n +4 = 0 \\to n =4$", "$\\displaystyle \\therefore 9m=-9 \\to m=-1$์ด๋ฏ€๋กœ $\\displaystyle mn=-4$์ด๋‹ค.", "$-4$" ]