(a2+2ab+b2)2÷(-a-b)3
问题描述：
(a2+2ab+b2)2÷(-a-b)3
（a²+2ab+b²）²÷（-a-b)³ 才对
答
=(a+b)的4次方÷[-(a+b)³]
=-(a+b)
=-a-b