SOLUTION: A circle is defined by the equation x2 + y2 – x – 2y – = 0. What are the coordinates for the center of the circle and the length of the radius?

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Question 905470: A circle is defined by the equation x2 + y2 – x – 2y – = 0. What are the coordinates for the center of the circle and the length of the radius?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Complete the square in x and y.
x%5E2+%2B+y%5E2+-x+-2y++=+0
x%5E2-x%2By%5E2-2y=0
%28x%5E2-x%2B1%2F4%29%2B%28y%5E2-2y%2B1%29=1%2F4%2B1
%28x-1%2F2%29%5E2%2B%28y-1%29%5E2=1%2F4%2B5%2F4
%28x-1%2F2%29%5E2%2B%28y-1%29%5E2=6%2F4=3%2F2
Center : (1%2F2,1)
Radius : sqrt%283%2F2%29=sqrt%286%29%2F2