-(3m²-n)(3m²+n)

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/25 13:28:40
-(3m²-n)(3m²+n)-(3m²-n)(3m²+n)-(3m²-n)(3m²+n)-(3m²-n)(3m²+n)

-(3m²-n)(3m²+n)
-(3m²-n)(3m²+n)

-(3m²-n)(3m²+n)
-(3m²-n)(3m²+n)
=-(9m^4-n²)
=n²-9m^4