Question

Which is a factor of x2 + 5x – 24?

(xO
(x-6)
O (x + 6)
(8 - x) O
(8 + x) O

Answer 1

D.) (x + 8)

Explanation:

Which two values multiply to (-24) and add to (5)?

These values are (-3) and (8):

-3 x 8 = -24

-3 + 8 = 5

As such, the factors include these two values. One of the factors (x + 8), is one of the answer choices.

x² + 5x - 24 = (x - 3)(x + 8)