分解因式x^3+2x^2-5x-6
问题描述:
分解因式x^3+2x^2-5x-6
答
x^3+2x^2-5x-6
=x^3+2x^2+x-6x-6
=x(x+1)^2-6(x+1)
=(x+1)(x^2+x-6)
=(x+1)(x+3)(x-2)