Find the radius of the circle with equation x^2 - 4x + y^2 - 6y - 36 = 0
Thank you so much!
Complete the square on x and y
x^2 - 4x + 4 + y^2 - 6y + 9 = 36 + 4 + 9
(x - 2)^2 + ( y - 3)^2 = 49
The radius = sqrt (49) = 7
