SOLUTION: x^2+6x+y^2-2y=90

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Question 312994: x^2+6x+y^2-2y=90
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%2B6x%2By%5E2-2y=90
%28x%5E2%2B6x%2B9%29%2B%28y%5E2-2y%2B1%29=90%2B1%2B9
%28x%2B3%29%5E2%2B%28y-1%29%5E2=100
Compare to the equation of a circle centered at (h,k) with radius R,
%28x-h%29%5E2%2B%28y-k%29%5E2=R%5E2
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Center:(-3,1)
Radius 10