Answer :

The GCF of 6^3, -9^2, and 12x is 3x, so you could rewrite it as
3x(2x^2-3x+4), hope this helps!
6x³ - 9x² + 12x
3x(2x²) - 3x(3x) - 3x(4)
3x(2x² - 3x - 4)