Question

4 Which of the following expressions is

equivalent to x2 + 2x – 15 ?
A (x + 2)(x – 7.5)
C (x – 3)(x + 5)
B (x + 3)(x - 5)
D none of these

Answer 1

(x-3)(x+5)

Explanation:

(x-3)(x+5)

x^2 - 3x + 5x - 15

x^2 + 2x - 15

Answer 2

(x-3)(x+5)

Explanation:

I put the expression onto a graphing calculator, then I put all of the answers onto the calculator and it was equal to the original expression. Hope this helps.