If x + (1/x) = 5, what is the value of W= x^2 + (1/x)^2?
Choose one:
A) w = 21	B) w = 22	C) w = 23	D) w = 24	E) 27

Rationale: "squaring on both sides , x ^ 2 + ( 1 / x ) ^ 2 + 2 ( x ) ( 1 / x ) = 5 ^ 2 x ^ 2 + ( 1 / x ) ^ 2 = 23 answer : c"
Answer: C