Question 181500
{{{x^2-2x+1+y^2-4y+4-4-4-1=0}}}
:
{{{(x-1)^2+(y-2)^2=9}}}
:
center is at (1,2) and the radius is 3
:
{{{drawing( 300, 300, -5, 5, -5, 5,
  grid( 1 ),
  red( circle( 1, 2, 3 ) ))}}}