SOLUTION: Find the center and radius of x^2+y^2-x+2y+1=0

Question 693439: Find the center and radius of x^2+y^2-x+2y+1=0
Answer by pmatei(79) (Show Source): You can put this solution on YOUR website!
This is solved by completing the squares:

Compare to where , are the coordinates of the circle's center and is the radius.
The center of the circle is at , and the radius is .
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