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x2y2(x+y)-8xy(x+y)+16(x+y)
人气:309 ℃ 时间:2020-02-03 08:04:04
解答
x2y2(x+y)-8xy(x+y)+16(x+y)
=(x+y)(x2y2-8xy+16)
=(x+y)(xy-4)2
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