5ab²-[2a²b-(4ab²-2a²b)]

来源:学生作业学帮网 编辑:学帮网 时间:2024/05/31 19:15:00

5ab²-[2a²b-(4ab²-2a²b)]

5ab²-[2a²b-4ab²+2a²b]
=5ab²-2a²b+4ab²-2a²b
=9ab²-2a²b

5ab²-[2a²b-(4ab²-2a²b)] =5ab²-(2a²b-4ab²+2a²b)=5ab²-2a²b+4ab²-2a²b=9ab²-4a²b