equation of circle with center (h,k) & radius r is
(x-h)^2+(y-k)^2 = r^2
x^2+2x+1^2+y^2-6y+3^2 = 1^2+3^2-14 , add 1^2+3^2 to both sides
(x+1)^2+(y-3)^2 = 1+9-14
(x+1)^2+(y-3)^2 = -4 , r^2 = -4 not possible
it's not equation of a circle
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