2分钟!因式分解(a²b-2ab²-b³)÷b-(a+b)(a-b)
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2分钟!因式分解(a²b-2ab²-b³)÷b-(a+b)(a-b)
2分钟!因式分解(a²b-2ab²-b³)÷b-(a+b)(a-b)
2分钟!因式分解(a²b-2ab²-b³)÷b-(a+b)(a-b)
原式=a²-2ab-b²-a²+b²
=-2ab
原式
=(a²-2ab-b²)-(a²-b²)
=(a²-2ab-b²)-a²+b²
=-2ab
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-2ab
(a²b-2ab²-b³)÷b-(a+b)(a-b)
=[b(a²-2ab-b²)]÷b-(a²-b²)
=(a²-2ab-b²)-(a²-b²)
=a²-2ab-b²-a²+b²
=-2ab