4x2-y2x2-4y2-(2x-y)2x2-4y2-2y2-4xy4y2-x2.-数学

题目简介

4x2-y2x2-4y2-(2x-y)2x2-4y2-2y2-4xy4y2-x2.-数学

题目详情

4x2-y2
x2-4y2
-
(2x-y)2
x2-4y2
-
2y2-4xy
4y2-x2
题型:解答题难度:中档来源:不详

答案

原式=
4x2-y2
x2-4y2
-
(2x-y)2
x2-4y2
+
2y2-4xy
x2-4y2

=
4x2-y2-4x2+4xy-y2+2y2-4xy
x2-4y2

=class="stub"0
x2-4y2

=0.

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