x2+y2−5x−5y+6=0x^{2}+y^{2}-5 x-5 y+6=0x2+y2−5x−5y+6=0
x2+y2−5x+5y+12=0x^{2}+y^{2}-5 x+5 y+12=0x2+y2−5x+5y+12=0
x2+y2−5x−5y−12=0x^{2}+y^{2}-5 x-5 y-12=0x2+y2−5x−5y−12=0
x2+y2−5x−5y+12=0x^{2}+y^{2}-5 x-5 y+12=0x2+y2−5x−5y+12=0