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数学
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(a2+2ab+b2)2÷(-a-b)3
（a²+2ab+b²）²÷（-a-b)³ 才对
人气：322 ℃ 时间：2020-03-31 18:37:22
解答
=(a+b)的4次方÷[-(a+b)³]
=-(a+b)
=-a-b
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