Circle

From the equation of a circle:

2x2+2y2+20x20y+68=02x2 +2y2 +20x -20y +68 = 0


Calculate the coordinates of the center of the circle S[x0, y0] and radius of the circle r.

Result

x0 =  -5
y0 =  5
r =  4

Solution:

(xx0)2+(yy0)2=r2 (x+5)2+(y5)2=42  x0=5 y0=5 r=4(x -x_0)^2+(y -y_0)^2 = r^2 \ \\ (x +5)^2+(y -5)^2 = 4^2 \ \\ \ \\ x_0=-5 \ \\ y_0=5 \ \\ r=4



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