计算:4a²+3b²-4a²+2ab-4b²
问题描述:
计算:4a²+3b²-4a²+2ab-4b²
答
4a²+3b²-4a²+2ab-4b²
=4a²-4a²+3b²-4b²+2ab
=-b²+2ab
=2ab-b²