
初二一道数学题。。。。
5a²b-{2a²b-[3a²b-ab(b-2a)÷(-1/2ab)}5a²b-{2a²b-[3a²b-ab(...
5a²b-{2a²b-[3a²b-ab(b-2a)÷(-1/2ab)}
5a²b-{2a²b-[3a²b-ab(b-2a)除以(负二分之一ab)} 展开
5a²b-{2a²b-[3a²b-ab(b-2a)除以(负二分之一ab)} 展开
3个回答
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5a²b-{2a²b-[3a²b-ab(b-2a)÷(-1/2ab)}
=5a²b-{2a²b-[3a²b-(b-2a)÷(-1/2)}
=5a²b-{2a²b-[3a²b+(b-2a)÷(1/2)}
=5a²b-{2a²b-[3a²b+(b-2a)X2}
=5a²b-{2a²b-[3a²b+2b-4a}
=5a²b-{2a²b-3a²b-2b+4a}
=5a²b-{-a²b-2b+4a}
=5a²b+a²b+2b-4a
=6a²b+2b-4a
=5a²b-{2a²b-[3a²b-(b-2a)÷(-1/2)}
=5a²b-{2a²b-[3a²b+(b-2a)÷(1/2)}
=5a²b-{2a²b-[3a²b+(b-2a)X2}
=5a²b-{2a²b-[3a²b+2b-4a}
=5a²b-{2a²b-3a²b-2b+4a}
=5a²b-{-a²b-2b+4a}
=5a²b+a²b+2b-4a
=6a²b+2b-4a
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