x三次方+x²y-xy²-y三次方 因式分解

问题描述:

x三次方+x²y-xy²-y三次方 因式分解
(2) ax²-bx²+bx-ax+a-b 因式分解
(3)x²+6xy+9y²-16a²+8a-1 因式分解

x³+x²y-xy²-y³=x²(x+y)-y²(x+y)
=(x+y)(x²-y²)
=(x+y)(x+y)(x-y)
=(x+y)²(x-y)