字典翻译 问答 其它 计算(x-y+4xyx-y)(x+y-4xyx+y)的正确结果是()A.y2-x2B.x2-y2C.(x-y)2x2-y2(x≠y)D.x2-y2x2+y2;
问题标题:
计算(x-y+4xyx-y)(x+y-4xyx+y)的正确结果是()A.y2-x2B.x2-y2C.(x-y)2x2-y2(x≠y)D.x2-y2x2+y2;
问题描述:

计算(x-y+4xyx-y)(x+y-4xyx+y)的正确结果是()

A.y2-x2

B.x2-y2

C.(x-y)2x2-y2(x≠y)

D.x2-y2x2+y2;

任怡回答:
  (x-y+4xyx-y)(x+y-4xyx+y)
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