Hello coyote,

Use synthetic division:

Code:-6 | 1 9 20 12 -6 -18 -12 -------------- 1 3 2 0

Sorry coyote. I should've asked if you knew synthetic division.

Code:x^2 + 3x + 2 __________________________ x + 6 | x^3 + 9x^2 + 20x + 12 -(x^3 + 6x^2) -------------- 3x^2 + 20x -(3x^2 + 18x) ------------ 2x + 12 -(2x + 12) ======= 0