作业帮3a²-[a²+(5a²-2a)-2(a²-3a)]=
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/30 03:38:00
![3a²-[a²+(5a²-2a)-2(a²-3a)]=](/uploads/image/z/765208-64-8.jpg?t=3a%26%23178%3B-%5Ba%26%23178%3B%2B%285a%26%23178%3B-2a%29-2%28a%26%23178%3B-3a%29%5D%3D)
3a²-[a²+(5a²-2a)-2(a²-3a)]=
3a²-[a²+(5a²-2a)-2(a²-3a)]=
3a²-[a²+(5a²-2a)-2(a²-3a)]=
3a²-[a²+(5a²-2a)-2(a²-3a)]
=3a²-[a²+5a²-2a-2a²+6a]
=3a²-(4a²+4a)
=-a²-4a
-a^2-a
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来源：学生作业帮助网 编辑：作业帮 时间：2024/04/30 03:38:00
3a²-[a²+(5a²-2a)-2(a²-3a)]=
3a²-[a²+(5a²-2a)-2(a²-3a)]=
3a²-[a²+(5a²-2a)-2(a²-3a)]=
3a²-[a²+(5a²-2a)-2(a²-3a)]
=3a²-[a²+5a²-2a-2a²+6a]
=3a²-(4a²+4a)
=-a²-4a
-a^2-a