Question 897148
{{{x^2+y^2-2x-4y-4=0}}}
{{{x^2-2x+y^2-4y=4}}}
{{{(x^2-2x+1)+(y^2-4y+4)=4+1+4}}}
{{{(x-1)^2+(y-2)^2=9}}}
A circle centered at (1,2) with a radius of 3.