x^3+2x^2y-4X-8y
问题描述:
x^3+2x^2y-4X-8y
因式分解
答
解
x³+2x²y-4x-8y
=x²(x+2y)-4(x+2y)
=(x²-4)(x+2y)
=(x-2)(x+2)(x+2y)