Hi, re Ty, Kudos to You, Spectacular!!! Keep Posting!! x^2+y^2-10x-4y+13=0 x^2+y^2-10x-4y = -13 (x-5)^2 + (y-2)^2 = -13 + 25 + 4 C(5,2), r = 4 and y = 0 ⇒ ⇒ x = 5 ±