Answer:
-1
Explanation:
The given equation can be written as
-3x +y^2 +2y +1=b+1
-3x +(y+1)^2=b+1
(-3x-b)+ (y+1)^2=1
This is to be compared with (x-a)^2 + (y-b)^2=c^2
where (a,b) is the center, and c is the radius of the circle.
Thus, we get y=-1, and this is our answer.
