x+(1/x) = 2.5 find x^2 + (1/x^2)
Pick one
A) 2.25 B) 3.25 C) 4.25 D) 5.25 E) 6.25

Rationale: "squaring on both sides ( x + 1 / x ) ^ 2 = 2.5 ^ 2 x ^ 2 + 1 / x ^ 2 = 6.25 - 2 x ^ 2 + 1 / x ^ 2 = 4.25 answer : c"
Answer: C