问题描述: (m²-6mn+9n²)÷(m-3n)-(4m²-9n²)÷(2m-3n)化简, 1个回答 分类:数学 2014-10-16 问题解答: 我来补答 (m²-6mn+9n²)÷(m-3n)-(4m²-9n²)÷(2m-3n)=(m-3n)^2÷(m-3n)-(2m+3n)(2m-3n)÷(2m-3n)=m-3n-(2m+3n)=m-3n-2m-3n=-m-6n 展开全文阅读