If x2+y2-xy=3 and y-x=1, thenxyx2+y2=___________.

1.	If x2+y2-xy=3 and y-x=1, thenxyx2+y2=___________.
Answer» If $x^{2} + y^{2} - x y = 3 and y - x = 1, then \frac{x y}{x^{2} + y^{2}} =___________.$

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