Ellipse

$x^2+84 y^2-24 x y-360 y+170 x+475=0$

$91 x^2+84 y^2-24 x y-170 x-360 y+475=0$

$91 x^2+84 y^2-24 x y-170 x+360 y+475=0$

$91 x^2+84 y^2-24 x y-170 x-360 y-475=0$