计算:(2ab+3b²-5)-(3ab+3b²-8)
问题描述:
计算:(2ab+3b²-5)-(3ab+3b²-8)
答
(2ab+3b²-5)-(3ab+3b²-8)
=2ab+3b^2-5-3ab-3b^2+8
=-ab+3