因式分解:x2(y-1)-(y-1)
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因式分解:x2(y-1)-(y-1)
因式分解:x2(y-1)-(y-1)
因式分解:x2(y-1)-(y-1)
=(x²-1)(y-1)
=(x+1)(x-1)(y-1)
(x²-1)(y-1)
=(x+1)(x-1)(y-1)
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