Question

Factor completely 3x3 − 3x2 − 18x.

3x(x + 3)(x + 2)
3x(x + 3)(x − 2)
3x(x − 3)(x + 2)
3x(x − 3)(x − 2)

Answer 1

3x^3 -3x^2 -18x = 3x(x^2 -x -6) = 3x(x-3)(x+2) so the 3rd choice is right sure 

hope helped