Question

Deirdre is factoring the polynomial x2 + 2x – 24. Which combination can she use to replace the middle term, 2x?

–6x and 4x
–6x and –4x
6x and –4x
6x and 4x

Answer 1

The middle term of the polynomial is 2x. Investigate which of the following choices will combine to form 2x. 

A. -6x + 4x = -2x
B. -6x + -4x = -10x
C. 6x + -4x = 2x
D. 6x + 4x = 10x

Therefore, the answer is the third choice.