已知(x+2)²+/y+1/=0求5xy²-2x²y+【3xy²-(4xy²-2x²y)】的值
2个回答
因为(x+2)²+/y+1/=0
所以x+2=0,y+1=0
所以x=-2,y=-1
5xy²-2x²y+【3xy²-(4xy²-2x²y)】=-4
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