已知2(x-1/3)^2+|y+1|=0,求6x^2y-2(x^2y-2xy-2x^2)-xy的值

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已知2(x-1/3)^2+|y+1|=0,求6x^2y-2(x^2y-2xy-2x^2)-xy的值已知2(x-1/3)^2+|y+1|=0,求6x^2y-2(x^2y-2xy-2x^2)-xy的值已知

已知2(x-1/3)^2+|y+1|=0,求6x^2y-2(x^2y-2xy-2x^2)-xy的值
已知2(x-1/3)^2+|y+1|=0,求6x^2y-2(x^2y-2xy-2x^2)-xy的值

已知2(x-1/3)^2+|y+1|=0,求6x^2y-2(x^2y-2xy-2x^2)-xy的值
利用非负数和的性质得
x=1/3,y=-1
将原式进行化简得:4x^2(y+1)+3xy
带入可得结果为-1