Question

Factor completely: 2a2 + a − 28

Answer 1

i believe the answer is (2a-7)(a+4) but just checking my work. Need to raise my grade badly.

Answer 2

Well, let's check your work.
Using FOIL (FIRST OUTSIDE INSIDE LAST) expand your answer.
(2a-7)(a+4)
2a(a) + 2a(4) + (-7)(a) + (-7)(4)
2a^2 + 8a -7a - 28
Combine like terms
2a^2 + a -28

which is the original equation, good job @flowmaster1776

Answer 3

thanks!

Answer 4

no problem :)