Question 1052358
x^2-2x+y^2+8y=5, moving the 5 across
complete each square, so x^2-2x+1 and y^2+8y+16
(x-1)^2+(y+4)^2=5+1+16; you have to add 1 and 16 to the other side, because they were suddenly added to the left.
The center is at (1,-4), and the radius is sqrt (22)
{{{drawing(300,300,-10,10,-10,10,grid(1),circle(1,-4,sqrt(22)))}}}