Factor 3x^3 + 9x^2 - 4x - 12. please
3x^3 + 9x^2 -4x - 12 factor by grouping
3x ( x + 3) - 4 ( x + 3)
(x + 3) ( 3x - 4)
there's something wrong with your factorization, if you foil it back, 3x * x = 3x^2, not 3x^3, and that 3x will mess up the entire thing
