化简(2x方-2x方)-3(x方y方+x方)+3(x方y方+y方)

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化简(2x方-2x方)-3(x方y方+x方)+3(x方y方+y方)化简(2x方-2x方)-3(x方y方+x方)+3(x方y方+y方)化简(2x方-2x方)-3(x方y方+x方)+3(x方y方+y方)(

化简(2x方-2x方)-3(x方y方+x方)+3(x方y方+y方)
化简(2x方-2x方)-3(x方y方+x方)+3(x方y方+y方)

化简(2x方-2x方)-3(x方y方+x方)+3(x方y方+y方)
(2x方-2x方)-3(x方y方+x方)+3(x方y方+y方)
= 0 - 3x方y方 - 3x方 +3x方y方 + 3y方
= 3y方 - 3x方