Question

Which of the following is equal to the rational expression when x = 5 or -3? x^2+x-6/x^2-2x-15

A. X-6/x-5
B. X+3/c-5
C. X-2/X+3
D. X-2/x-5

Answer 1

C. X-2/X+3

Explanation:

(4/x) + (4/y) / (16/x2y2) is where we start. I will factor out

1/(16/x2y2).

(1/(16/x2y2)) (64xy2 + 4/y) = (x2y2/16)(64xy2 + 4/y)

I need to factor out a 4/y from there.

(x2y/4)(16xy + 1) = x2y (16xy + 1) / 4