- #1

Amer

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$Ax^2 + Bxy + Cy^2 + Dx + Ey + F = 0$ with $B^2 = 4AC$

what is the coordinate of the vertex of the parabola or in other word how to determine the vertex of a given parabola for example

$4x^2 + 4xy + y^2 - 5x + 7y + 11 =0 $

Thanks.