Factor the expression completely -12x^3+32x^4

To factor the expression completely -12x^3+32x^4, we can take out the greatest common factor, which is 4x^3, to get:

-12x^3+32x^4 = 4x^3(-3+8x)

Therefore, the expression -12x^3+32x^4 can be factored completely as 4x^3(-3+8x).