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](/uploads/image/z/980908-52-8.jpg?t=%E5%B7%B2%E7%9F%A52%28x-1%2F3%29%5E2%2B%7Cy%2B1%7C%3D0%2C%E6%B1%826x%5E2y-2%28x%5E2y-2xy-2x%5E2%29-xy%E7%9A%84%E5%80%BC)
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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
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