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(x-y)^4·(x-y)-2(y-x)³·(y-x)²怎么算,
人气:399 ℃ 时间:2020-06-07 19:44:14
解答
(x-y)^4·(x-y)-2(y-x)³·(y-x)²
=(x-y)^4·(x-y)+2(x-y)³·(x-y)²
=(x-y)^5+2(x-y)^5
=3(x-y)^5
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