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﹙x²-y²﹚﹙x+y﹚-﹙x-y﹚³ 用公式法 因式分解
人气:213 ℃ 时间:2020-05-19 11:54:48
解答
原式=(x+y)²(x-y)-(x-y)³
=(x-y)[(x+y)²-(x-y)²]
=(x-y)(x+y+x-y)(x+y-x+y)
=4xy(x-y)
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