Equation of circle passing through point of intersection of circles x2+y2+2x−2y−2=0 and x2+y2−2x+2y−7=0 is given by (x2+y2+2x−2y−2) +λ(x2+y2−2x+2y−7)=0 or (1+λ)x2+(1+λ)y2+2(1−λ)x −2(1−λ)y−(7λ+2)=0 x2+y2+2x−2y−2=0 and x2+y2−2x+2y−7=0 is given by (x2+y2+2x−2y−2) +λ(x2+y2−2x+2y−7)=0 or (1+λ)x2+(1+λ)y2+2(1−λ)x −2(1−λ)y−(7λ+2)=0 ∵ Centre of circle (