r 2 x-h 2 y-k 2
r 2 x-h 2 y-k 2, x-h 2 + y-k 2 r 2, x-h 2 - y-k 2 r 2, left x-h right 2 + left y-k right 2 r 2, left x-h right 2 left y-k right 2 r 2, x-r 2 + y-r 2 r 2, y x-h 2+k, x 2+y 2 r, x-a 2+ y-b 2 r2, y x 2/2r, x 2+y 2 rx
r 2 x-h 2 y-k 2. There are any references about r 2 x-h 2 y-k 2 in here. you can look below.
r 2 x-h 2 y-k 2
x-h 2 + y-k 2 r 2
x-h 2 - y-k 2 r 2
left x-h right 2 + left y-k right 2 r 2
left x-h right 2 left y-k right 2 r 2
x-r 2 + y-r 2 r 2
y x-h 2+k
x 2+y 2 r
x-a 2+ y-b 2 r2
y x 2/2r
x 2+y 2 rx
r 2 x-h 2 y-k 2, x-h 2 + y-k 2 r 2, x-h 2 - y-k 2 r 2, left x-h right 2 + left y-k right 2 r 2, left x-h right 2 left y-k right 2 r 2, x-r 2 + y-r 2 r 2, y x-h 2+k, x 2+y 2 r, x-a 2+ y-b 2 r2, y x 2/2r, x 2+y 2 rx