3a²+2ab=5,3b²+2ab=2,a²-b²=

来源：学生作业帮助网编辑：六六作业网时间：2024/11/16 03:24:27

3a²+2ab=5,3b²+2ab=2,a²-b²=3a²+2ab=5,3b²+2ab=2,a²-b²=3a²

3a²+2ab=5,3b²+2ab=2,a²-b²=
3a²+2ab=5,3b²+2ab=2,a²-b²=

3a²+2ab=5,3b²+2ab=2,a²-b²=
3a²+2ab=5,3b²+2ab=2,
两个式子相减
3a²-3b²=3
所以a²-b²=1