初二数学题因式分解(x^3-3x^2)-(x^2-x-6)

问题描述:

初二数学题因式分解(x^3-3x^2)-(x^2-x-6)

(x^3-3x^2)-(x^2-x-6)
=x^2(x-3)-(x-3)(x+2)
=(x-3)(x^2-x-2)
=(x-3)(x-2)(x+1)