-(2x²+3y)(3y-2x²)=
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/13 13:57:25
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-(2x²+3y)(3y-2x²)=
-(2x²+3y)(3y-2x²)=
-(2x²+3y)(3y-2x²)=
(2x²)²-(3y)²
=4x四次方-9y²
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来源:学生作业帮助网 编辑:作业帮 时间:2024/07/13 13:57:25
-(2x²+3y)(3y-2x²)=
-(2x²+3y)(3y-2x²)=
-(2x²+3y)(3y-2x²)=
(2x²)²-(3y)²
=4x四次方-9y²