作业帮（4a²-3b²）-[2(a²-1）+2b²-3]
来源：学生作业帮助网 编辑：作业帮 时间：2024/08/13 10:28:42
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（4a²-3b²）-[2(a²-1）+2b²-3]
（4a²-3b²）-[2(a²-1）+2b²-3]
（4a²-3b²）-[2(a²-1）+2b²-3]
（4a²-3b²）-[2(a²-1）+2b²-3]
=4a²-3b²-(2a²-2+2b²-3)
=4a²-3b²-(2a²+2b²-5)
=4a²-3b²-2a²-2b²+5
=(4a²-2a²)+(-3b²-2b²)+5
=2a²-5b²+5
（4a²-3b²）-[2(a²-1）+2b²-3]
=4a²-3b²-2(a²-1）-2b²+3
=4a²-3b²-2a²+2-2b²+3
=2a²-5b²+5