Hi, I have this problem where I am supposed to find the circle and radius.

Here is what I did and the steps (click on the picture to enlarge it)

And I'm stuck at this part.

I think I am supposed to be using 'completing the square' here right?

But can someone explain to me how to do that?

Because after that, I'm able to find the center, which is (h,k)

Then the radius would be the square root of the number that comes at the other end.

Thanks