⇒k=0,6 ∴ Centre of circle is (2,0) or (2,6) When centre is (2,0) ∴ Radius of circle =OA
=√(2+1)2+(0−3)2=√9+9=√18
When centre is (2,6) ∴ Radius of circle =√(2+1)2+(6−3)2 =√9+9=3√2 ∴ Equation of circle is (x−2)2+(y−0)2=18 ⇒x2+y2−4x−22=0 or (x−2)2+(y−6)2=18 ⇒x2+y2−4x−12y+22=0