1. The problem statement, all variables and given/known data Find the center and radius of the circle with the given equation: x^2+y^2+4y-117=0 2. Relevant equations Completing the Square Formula of a Circle (x-h)^2-(y-k)^2=r^2 3. The attempt at a solution All of the problems I've encountered like this involve completing the square. I haven't seen one where there is no X and coefficient (the same goes for Y). I was able to correctly calculate that the y-coordinate of this circle is -2. The x-coordinate is supposed to be 0 and the radius is 11, but I don't know the steps to get there. I have no x coefficient to complete the square with. Thank you!