Question 1096681
x^2 + y^2 - 10x - 18 = 0

x^2 - 10x + y^2 = 18
Complete the square
x^2 - 10x + 25 + y^2 = 18 + 25 = 43
(x-5)^2 + y^2 = 43
Center (5,0)
r = sqrt(43)