Question 972179
(x^2) + (y2-6y+  -----) =27
x^2 + (y^2+6y +9)=27+9
x^2 +  (y+3)^2 =36

This is a circle with center (0.-3) and radius 6, 
x-h ; h=0

y-k;  k=-3

sqrt 36=6