(2m的平方-3m-8)-(-4m的平方+5m+3)+5
问题描述:
(2m的平方-3m-8)-(-4m的平方+5m+3)+5
答
(2m^2 - 3m - 8) - (-4m^2 + 5m + 3) + 5
= 2m^2 - 3m - 8 + 4m^2 - 5m - 3 + 5
= 6m^2 - 8m - 6