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Y a x x0 y0. (X + 2y)^2 + (x-y-1)^2 = 0. Y=X^2 Y=0 X=3. Y = 3 - 2 X - X^2 Y = (2 + X)/(X + 1). 2x-2y/x^2-y^2.
(X + 2y)^2 + (x-y-1)^2 = 0. Y=X^2 Y=0 X=3. Y = 3 - 2 X - X^2 Y = (2 + X)/(X + 1). 2x-2y/x^2-y^2.

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