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