因式分解 x^3+2x^2-16x-32和
问题描述:
因式分解 x^3+2x^2-16x-32和
x^3+ax^2-2X^2-2ax
答
x^3+2x^2-16x-32
=x^2(x+2)-16(x+2)
=(x^2-16)(x+2)
=(x-4)(x+4)(x+2)
x^3+ax^2-2X^2-2ax
=x(x+a)(x-2)