Factor completely: 3x3−12x3x^3 - 12x3x3−12x.
3x(x2−12)3x(x^2-12)3x(x2−12)
3x(x2−4)3x(x^2-4)3x(x2−4)
3(x3−4x)3(x^3-4x)3(x3−4x)
3x(x−2)(x+2)3x(x-2)(x+2)3x(x−2)(x+2)