Find the values of x for which the expression is underlined; 6x – 1/x2 + 4x – 5

A. +4 or+1
B. -5 or+1
C. -5 or -1
D. +5 or -1
E. +4 -1

Correct Answer: Option B

B. -5 or+1

Explanation
6x – 1/x2 + 4x – 5

when x = 1, x2 + 4x – 5 = 12 + 4 – 5 = 0
when x = -5, x2 + 4x – 5 = (-5)2 + 20 – 5
25 – 20 – 5 = 0, x = -5 or 1