Find the center (h,k) and radius
posted by Liz .
Find the center (h,k) and radius r of the circle and then use these to (a) graph the circle and (b) find the intercepts, if any.
3x^2+36x+3y^2=0

3x^2+36x+3y^2=0
x^2+12x+y^2=0
(x^2+12x+36) + y^2 = 36
(x+6)^2 + y^2 = 36
hat should make it easy to get the required info.