Question

Factor completely: 2a2 + a − 28

(2a − 7)(a + 4)

(2a + 7)(a − 4)

(2a − 4)(a + 7)

Prime

Answer 1

it's (a+4)(2a-7)

Answer 2

well if you have choices, just do the math on the choices until you get the right one.

Answer 3

A.

Answer 4

The way i always try to factor these is figuring out: what b*c = 28 and b+c= 1. It's only a bit tricky because you have some coefficient in front of your a^2 term.

Answer 5

the answer is (2a-7)(a+4)