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因式分解(x2-y2)(x+y)-(x-y)?
人气:459 ℃ 时间:2020-01-25 22:34:25
解答
(x2-y2)(x+y)-(x-y)
=(x+y)(x-y)(x+y)-(x-y)
=(x-y)[(x+y)^2-1]
=(x-y)(x+y+1)(x+y-1)
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