Question 739590
the formula for circle {{{(x-h)^2+(y-k)^2=r^2}}}

  where {{{ h}}} and {{{k}}} are the {{{x}}} and {{{y}}} coordinates of the center of the circle 

in your case we have: {{{(x - 8)^2 + (y + 8)^2 = 25}}}

so, coordinates of the center of the circle  are: {{{ h=8}}} and {{{k=-8}}} and radius {{{r=5}}}


{{{
drawing( 500, 500, -5, 15, -15, 5, 
  grid( 1 ),circle(8,-8,0.2),
  red( circle( 8, -8, 5 ) )
  
))
}}}