Chords & Intersection of Circles
Intersection of ellipses and circle
If the points of intersection of the ellipses x2 + 2y2 – 6x – 12y + 23 = 0 and 4x + 2y2 – 20x – 12y + 35 = 0 lie on a circle of radius r and centre (a, b), then the value of ab + 18r2 is