Answer:
3x^3 + 12x^2 - 9x = 3(x^3+4x^2-3x)
x^2 + 8x - 20 = (x + 10)(x - 2)
2x^2 + 13x + 20 = (x + 4)(2x + 5)
4x^2 - 25 = (2x + 5)(2x - 5)
x^2 - 9 = (x + 3)(x - 3)
x^2 - 12x + 36 = (x - 6)(x - 6)
5x^2 - 80 = 5(x + 4)(x - 4)
6x^2 + 11x + 3 = (3x + 1)(2x + 3)
10x^2 - 11x - 6 = (5x + 2)(2x - 3)
