x2+y2−8x+10y−8=0x^{2}+y^{2}-8 x+10 y-8=0x2+y2−8x+10y−8=0
x2+y2−8x−10y−8=0x^{2}+y^{2}-8 x-10 y-8=0x2+y2−8x−10y−8=0
x2+y2+8x−10y−8=0x^{2}+y^{2}+8 x-10 y-8=0x2+y2+8x−10y−8=0
x2+y2−8x−20y+8=0x^{2}+y^{2}-8 x-20 y+8=0x2+y2−8x−20y+8=0