SOLUTION: What is the standard form of a circle for the equation X^2+y^2+12x-22y+13=0 ?

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Question 753098: What is the standard form of a circle for the equation X^2+y^2+12x-22y+13=0 ?
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E2%2By%5E2%2B12x-22y%2B13=0+
%28x%5E2%2B12x%29%2B%28y%5E2-22y%29%2B13=0+...complete the square
%28x%5E2%2B12x%2B__%29-___%2B%28y%5E2-22y%2B____%29-___%2B13=0+
%28x%5E2%2B12x%2B36%29-36%2B%28y%5E2-22y%2B121%29-121%2B13=0+
%28x%2B6%29%5E2%2B%28y-11%29%5E2-121-36%2B13=0+
%28x%2B6%29%5E2%2B%28y-11%29%5E2-144=0+
%28x%2B6%29%5E2%2B%28y-11%29%5E2=144+
%28x%2B6%29%5E2%2B%28y-11%29%5E2=12%5E2+.......the center is at (-6,11) and radius r=12