Question

Is h(x) a factor of f(x) =x^3-3x^2x-4x-12

Answer 1

Solve by Grouping
(x^3-3x^2)(-4x-12)
x^2(x-3)-4(x-3)
(x^2-4)(x-3)
= (x+2)(x-2)(x-3)