x^2y^2-4x-6y+13=0求(x-y)^-2的值悬赏可以多给 要准确
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已知x^2+y^2+13-4x+6y=0,求(2x-y)^2-2(2x-y)(x+2y)+(x+2y)^2
已知:x^2+y^2+4x-6y+13=0,求x^y值.
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已知x²+y²-6x+4y+13=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)²已知x²+y²-6x+4y+13=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)²
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x^2+y^2+13=6x-4y求x^y的值
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