(6m的平方-4m-3)-(2m的平方-4m+1)怎么算啊
问题描述：
(6m的平方-4m-3)-(2m的平方-4m+1)怎么算啊
答
（6m^2-4m-3)-(2m^2-4m+1) =6m^2-4m-3-2m^2+4m-1 =4m^2-4
(6m的平方-4m-3)-(2m的平方-4m+1)怎么算啊
（6m^2-4m-3)-(2m^2-4m+1) =6m^2-4m-3-2m^2+4m-1 =4m^2-4