Question

x2 -2x + y2 + 10y = -1?

Answer 1

That looks like a circle. Complete the square on x, complete the square on y, and you should end up with something the can be put in the form \((x-h)^2+(y-k)^2 = r^2\) which is the formula of a circle with center at \((h,k)\) and radius \(r\)