SOLUTION: x^2+y^2+6x-6y-107=0 What is the Radius and Center of a circle

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Question 992219: x^2+y^2+6x-6y-107=0 What is the Radius and Center of a circle
Answer by Alan3354(69443) About Me  (Show Source):
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x^2+y^2+6x-6y-107=0 What is the Radius and Center of a circle
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x^2+y^2+6x-6y = 107
Complete the squares for x and y:
x%5E2+%2B+6x+%2B+9+%2B+y%5E2+-+6y+%2B+9+=+107+%2B+9+%2B+9+=+125
%28x%2B3%29%5E2+%2B+%28y-3%29%5E2+=+125
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--> center at (-3,3)
r+=+sqrt%28125%29+=+5sqrt%285%29