-3ab-4a^2+3a^2+5ab
问题描述:
-3ab-4a^2+3a^2+5ab
答
=(-4+3)a²+(5-3)ab
=-a²+2ab
答
解
-3ab-4a²+3a²+5ab
=(-4a²+3a²)+(5ab-3ab)
=-a²+2ab