化简（2x²-2y²）-3(x²y²+y²)+3(x²y²+y²),其中x=-1,y=2

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化简（2x²-2y²）-3(x²y²+y²)+3(x²y²+y²),其中x=-1,y=2化简（2x²-2y&#

化简（2x²-2y²）-3(x²y²+y²)+3(x²y²+y²),其中x=-1,y=2
化简（2x²-2y²）-3(x²y²+y²)+3(x²y²+y²),其中x=-1,y=2

化简（2x²-2y²）-3(x²y²+y²)+3(x²y²+y²),其中x=-1,y=2
（2x²-2y²）-3(x²y²+y²)+3(x²y²+y²)=2x²-2y²=2-8=-6