(xy-x2)÷x2-2xy+y2xy•x-yx2-数学

题目简介

(xy-x2)÷x2-2xy+y2xy•x-yx2-数学

题目详情

(xy-x2
x2-2xy+y2
xy
x-y
x2
题型:解答题难度:中档来源:不详

答案

(xy-x2
x2-2xy+y2
xy
×class="stub"x-y
x2

=x(y-x)÷
(x-y)2
xy
×class="stub"x-y
x2

=-x(x-y)×class="stub"xy
(x-y)2
×class="stub"x-y
x2

=-y.
故答案为-y.

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