Question

Factor completely 2x3 + x2 - 18x - 9. (2 points)

(x2 - 9)(2x + 1)
(x - 3)(x + 3)(2x - 1)
(x - 3)(x + 3)(2x + 1)
(2x - 3)(2x + 3)(x - 1)

Answer 1

i suck at factoring
if it was me, i would cheat
the answer lies within
http://www.wolframalpha.com/input/?i=2x3+%2B+x2+-+18x+-+9

Answer 2

well dats not a good idea
lets start by factoring out one x

Answer 3

looks like
\[(2 x+1) (x-3) (x+3)\] is the winner

Answer 4

it's not any of the choices...

Answer 5

It's C