What is the radius of the circle x^2+6x + y^2 - 12y = 36?

Step-by-step explanation:

hello:

x²+6x + y² - 12y = 36

completed to suqard : (x²+6x) + (y² - 12y) = 36 means:

(x²+6x+9) - 9 + (y² - 12y+36) - 36 = 36

(x+3) ² + (y-6) ² = 9² ... standard form when the radius is : 9