【答案】 最佳答案3.3ab-4AB 8 AB-7AB + AB = ______.
4.7倍-(5X-5Y)-Y = ______.
5.23a3bc2-15ab2c +8 ABC-24a3bc2-8abc = ______.
6. -7X2 +6 x +13 X2-4X-5×2 = ______.
7.2y +(-2Y +5) - (1411 +2)= ______.
11. (2×2-3XY 4 Y2)+(X2 +2 XY-3Y2)= ______.
12.2A-(3A-2B +2)+(3A-4B-1)= ______.
13. - 组件6x2-7X2 +15 X2-2×2 = ______.
14.2-(X +3 Y) - (-XY) - (XY)= ______.
16.2倍+2 Y-[3X-2(X-Y)] = ______.
17.5-(1-X)-1 - (X-1)= ______.
18. ()+(4XY 7 X2-Y2)= 10X2-XY.
19. (4xy2-2x2y) - ()= X3-2x2y +4 XY2 + Y3.
21.已知A = X3-2×2 + X-4,B = 2×3-5X 3,计算A + B = ______.
22.已知A = X3-2×2 + X-4,B = 2×3-5X 3,计算AB = ______.
23.若a = -0.2,B = 0.5,代数表达式 - (| A2B | - | AB2 |)的______值.
25.一个多项式减去3M4-M3-2M 5太-2M4-3立方米-2平方米-1,则该多项式等于______.
26. - (2×2-Y2) - [2Y2-(X2 +2 XY)] = ______.
27.如果-3a3b2和5AX-1进行2相类似的项目,则x = ______,Y = ______.
28. (-Y +6 +3 Y4-Y3) - (2Y2,3Y3 + Y4-7)= ______.
29.的代数4×简单化[7X2-5X-3(1-2X + X2)]结果是______.
30.2a-B2 + C-D3 = 2A +()-D3 = 2A-D3-()= C-().
31.3a-(2A-3B)+3(A-2B)-B = ______.
32.代数的x简化[Y-2X-(X + Y)]等于______.
33. [5A2 +()A-7] + [()A2-4A +()] = A2 +2 +1.
34.3x - [Y-(2X + Y)] = ______.
35.简化| 1-X + Y | - | XY |(其中x 0表示)等于______.
36.已知的x≤Y,X + Y-| X-Y | = ______.
37.已知的x
B. -3(X + Y);
C.(-XY)-2(X + Y);
D. 3(倍+ Y).
54.2a-[图3b-5α-(图2a-图7b)]等于[]
A.-7α10 b;
> B.图5a +4 b的;
C.-A-4B;
D. 9A-10B.
55.减去-3M等于代数5平方米-3M-5是[]
答:5(M2-1);
B.5平方米-6M-5;
C. 5(M2 +1);
四-(5平方米6米-5).
56.多项式2AB-9A2-5AB-4A2同类项合并,应该是[]
A.(9A2,4A2)+(-2AB-5AB);
B.(9A2 +4 A2) - (2AB-5AB);
C.(9A2,4A2) - (2AB +5 AB);
四(9A2 -4A2)+(2AB-5AB).
57.当a = 2,B = 1时,-A2B 3 BA2-(-2A2B)等于[]
答:20;
二24; BR p>三0;
D. 16.
,正确的选择是[]
答:没有类似的项目;
B.(2)和(4)是同类项;
C.(2)和(5)相似的项目;
D.(2)和(4)是不一样的项目.
59.如果A和B有五个多项式,则AB必须是[]
A.十多项式;
B.零多项式;
C.多项式的不超过5倍的数量;
D.低于多项式的5倍.
60. - {[ - (X + Y)]} + { - [(X + Y)]}等于[]
A. 0;
二-2Y;
C. X + Y;
D.-2X-2Y.
61.如果A = 3×2-5X +2,B = 3×2-5X +6,然后A和B的大小是
[]
答:A> B;
>
B. A = B;
三A C.-2AN;
D. -2.
66. (5A-3B)-3(A2-2B)等于[]
答:3A2 +5 +3 b;
B. 2A2 +3 b;
C. 2A3-B2;
D.-3A2 +5 A-5B.
67. X3-5×2-4X +9等于[]
A.(X3-5×2) - (-4X +9);
B. X3-5×2 - (4倍+ 9);
C. - (-X 3 5×2) - (4×-9);
D. 3倍+9-(5×2 - 4倍).
[]
结果69.4x2y-5xy2应该是[]
A.-X2Y;
B. -1;
C.-X2Y2;
D.以上答案都不对.
(三)简化
70. (4×2-8X +5) - (X3 +3 X2-6X +2).
72. (0.3x3-X2Y + XY2-Y3) - (-0.5x3-X2Y +0.3 XY2).
73. - {2A2B-[3ABC-(4ab2-A2B)]}.
74. (5a2b 3 A2B2-AB2) - (-2ab2 3 A2B2 + A2B).
75. (X2-2Y2-Z2) - (-Y2 +3 X2-Z2)+(5×2-Y2 +2 Z2).
76. (3A6-A4 2 A5-4A3-1) - (2-α+ A3-A5-A4).
77. (图4a-2B-C)-5α-[图8b-2 C-(A + B)].
78. (2M-3N) - (3M-2N)+(5N + M).
79. (3A2-4AB-5B2) - (2B2-5A2 +2 AB) - (-6AB).
80. XY-(2XY-3Z)+(3XY-4Z).
81. (-3X3 +2 X2-5X +1) - (5-6X-X2 + X3).
83.3x-(2X-4Y-6X)+3(-2Z +2 Y).
84. (1-X 2 4 3 X4-X3) - (2倍2的x×4-5).
85.如果A = 5A2-2AB +3 B2,B =-2B2 +3 AB-A2,计算A + B.
86.已知A = 3A2-5A-12,B = 2A2 +3-4,请求2(AB).
87.2米-{-3N + [-4M-(3M-N)]}.
88.5m2n +(-2m2n)2 MN2-(+ M2N).
89.4(XY + Z)-2(X + YZ)-3(-XYZ).
90.2(X2-2XY + Y2-3)+(1-X 2 + Y 2) - (2倍2的xy + y2)上.
92.2(A2-AB-B2)-3 - (4α-2b)的2(7A2-4AB + B2).
94.4x-2(X-3)-3 - [X-3(4 - 2×)8].以下几种简化,重新评估
97之前
(4).已知A + B = 2,AB = -1时,评价3(A + B)2(AB)2-5(A + B)2×(AB)2英寸/> 98
追问: 求答案