(x-y)(x²+xy+y²)=?
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/20 18:20:33
![(x-y)(x²+xy+y²)=?](/uploads/image/z/10408260-12-0.jpg?t=%EF%BC%88x-y%EF%BC%89%EF%BC%88x%26%23178%3B%2Bxy%2By%26%23178%3B%EF%BC%89%3D%3F)
(x-y)(x²+xy+y²)=?
(x-y)(x²+xy+y²)=?
(x-y)(x²+xy+y²)=?
(x-y)(x²+xy+y²)
=x³+x²y+xy²-x²y-xy²-y³
=x³-y³
(x-y)(x²+xy+y²)
=x³+x²y+xy²- x²y-xy²-y²
=x³-y³
请采纳,谢谢
(x-y)(x²+xy+y²)=x(x²+xy+y²)-y(x²+xy+y²)=x³+x²y+xy²-x²y-xy²-y³=x³-y³