Question: The equation x2 xy + y2 = 3 represents a rotated ellipse, that is, an ellipse whose axes are not parallel to the coordinate

The equation x2 – xy + y2 = 3 represents a “rotated ellipse,” that is, an ellipse whose axes are not parallel to the coordinate axes. Find the points at which this ellipse crosses the –axis and show that the tangent lines at these points are parallel.

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