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分解因式:(x+y)的两次(x-y)+(x+y)(x-y)的两次
人气:390 ℃ 时间:2020-10-01 04:43:14
解答
(x+y)的两次(x-y)+(x+y)(x-y)的两次
=(x+y)(x-y)(x+y+x-y)
=2x(x+y)(x-y)
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