Reduce the equation to one of the standard forms
x2 – y2 + z2 – 2x + 2y + 8z + 13 = 0
And what kind of surface is it?
I got (x-1)^2 - (y-1)^2 + (z+4)^2 = 5
that answer was wrong, so then i switched the (y-1)^2 to (y+1)^2 and it was still wrong. I also used complete the square to solve it. So now I'm lost and not sure what to do, HELP!