Question 860197
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Hi,
2x^2+2y^2+4x-12y-22=0
 x^2 + y^2 + 2x - 6y = 11    |completing the Squares
 (x+1)^2 + (y-3)^2 = 11 + 1 + 9
 (x+1)^2 + (y-3)^2 = 21   
circle:  C(-1,3) r = sqrt(21)