问题描述： (4m^2+9n^2)(3n-2m)(-3n-2m) 请帮我算一下 1个回答 分类：数学 2014-10-27 问题解答： 我来补答 (4m^2+9n^2)(3n-2m)(-3n-2m) =-(4m^2+9n^2)(3n-2m)(3n+2m) =-(4m^2+9n^2)(9n^2-4m^2)=-(81n^4-16m^4)=16m^4-81n^4 展开全文阅读
