The equation of pole with respect ts the point β,2 to the given circle is ‌x+2y−2(x+1)+1=0 ‌⇒−x+2y−1=0‌ or ‌x−2y+1=0 Inverse of point P(1,2) is the foot (h,k) of the perpendicalar from the point (1,2) to the line x−2y+1=0 ‌⇒‌‌‌