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因式分解(x2-y2)-(x-y)2
人气:327 ℃ 时间:2020-02-01 12:53:34
解答

(x²-y²)-(x-y)²
=(x-y)(x+y)-(x-y)²
=(x-y)[(x+y)-(x-y)]
=(x-y)×2y
=2y(x-y)
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