Images A X2 XY Y2 X Y

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A x2 xy y2 x y. Система x^2+XY=7. X2+XY+y2. Y/X x2-XY/y2. Система x-y=5 x^2+2xy-y^2-7.
Система x^2+XY=7. X2+XY+y2. Y/X x2-XY/y2. Система x-y=5 x^2+2xy-y^2-7.

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