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因式分解;x²(x-y)+(y- x)
人气:249 ℃ 时间:2019-12-18 22:52:35
解答
x²(x-y)+(y- x)
=x²(x-y)-(x-y)
=(x-y)(x²-1)
=(x-y)(x+1)(x-1)
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