Question

Factor x2 - x - 72

A (x - 9)(x + 8)

B (x + 9)(x - 8)

C (x - 36)(x - 36)

D (x - 9)(x - 8)

Answer 1

Factor x2 - x - 72

A) (x - 9)(x + 8) <=YOUR ANSWER

B) (x+9)(x - 8)

C) (x - 36)(x - 36)

D) (x - 9)(x - 8)

Answer 2

A (x - 9)(x + 8)

Explanation:

x^2 - x - 72

As you know -72 = -9 * 8 and -9 + 8 = -1

So factor:

= (x - 9)(x + 8)

Answer:

A (x - 9)(x + 8)