(x-y)(x²+xy+y²)=?

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/28 04:43:08
(x-y)(x²+xy+y²)=?(x-y)(x²+xy+y²)=?(x-y)(x²+xy+y²)=?(x-y)(x²+xy+y&

(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