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 1037648: 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 Alan3354(69443) About Me  (Show Source):
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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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x^2-x + y^2–2y = 0
Complete the squares of x and y
x^2-x+1/4 + y^2–2y+1 = 0+1/4+1= 5/4
%28x-1%2F2%29%5E2+%2B+%28y-1%29%5E2+=+5%2F4+=+r%5E2
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Center (1/2,1)
r+=+sqrt%285%2F2%29