x2+y2−hx−ky=0x^{2}+y^{2}-h x-k y=0x2+y2−hx−ky=0
x2+y2−h−2k=0x^{2}+y^{2}-h-2 k=0x2+y2−h−2k=0
x2+y2=2h+kx^{2}+y^{2}=2 h+kx2+y2=2h+k
x2+y2−5h−k=0x^{2}+y^{2}-5 h-k=0x2+y2−5h−k=0
x2+y2−4h−7k=0x^{2}+y^{2}-4 h-7 k=0x2+y2−4h−7k=0
