因式分解:x的三次方y-xy的三次方

问题描述:

因式分解:x的三次方y-xy的三次方

x³y-xy³
xy·x²-xy·y²
=xy(x²-y²)
=xy(x+y)(x-y)

xy(x的平方-y的平方)=xy(x-y)(x+y) 不知道行不行?

x³y-xy³
=xy(x²-y²)
=xy(x+y)(x-y)