x+yx2+2xy+y2=()x+y.-数学

题目简介

x+yx2+2xy+y2=()x+y.-数学

题目详情

x+y
x2+2xy+y2
=
()
x+y
题型:填空题难度:中档来源:不详

答案

class="stub"x+y
x2+2xy+y2
=class="stub"x+y
(x+y)2
=class="stub"1
x+y

故填:1.

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