Question 52381
This is the equation of a circle.  
{{{ (x-h)^2 + (y-k)^2 = r^2}}} is the equation of a circle with center at (h,k) and of radius 1.  


In this case {{{ (x+1/2)^2+ (y-1/3)^2=1 }}} is a circle with center at ({{{-1/2}}}, {{{1/3}}}) and radius 1.


R^2 at SCC