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因式分解:x^(a-2)+x^(a-3)-x^(a-4) 快
人气:379 ℃ 时间:2020-03-25 06:55:48
解答
x^(a-2)+x^(a-3)-x^(a-4)
=x^(a-4)(x^2+x-1)
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