(x-y)(x²+xy+y²)=?
来源:学生作业学帮网 编辑:学帮网 时间:2024/06/02 02:07:42
(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
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来源:学生作业学帮网 编辑:学帮网 时间:2024/06/02 02:07:42
(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