The equation of the circle passing through the point (2,-1) and having two diameters along the pair of lines 2x2+6y2−x+y−7xy−1=0 is
2x2+6y2−x+y−7xy−1=0x−2y−1=0 →(1)2x−3y+1=0→(2)Centre(−5,−3)∴ x2+y2+10x+6y−19=0