The graphs of x^2-2x+y^2+10y=0. Find the radius of this circle.
We can start this off by completing the square to get it into the general formula,
[(x-1)^2-1] + [(y+5)^2-25] = 0
(x-1)^2 + (y+5)^2 = 26
the formula for the graph of a circle is...
(x-h)^2 + (x-k)^2 = r^2
r^2 = radius^2
r^2 = 26
r = sqrt(26)
p.s plz tell me if I did anything wrong.