Question 1139309
{{{midpointx=(1-1)/2=0}}}


{{{midpointy=(4-4)/2=0}}}


radiusSquared=((1/2)sqrt((1-(-1))^2+(4-(-4))^2))^2
{{{radiusSquared=(1/4)((4)+(64))=68/4}}}
{{{radiusSquared=17}}}


{{{highlight(x^2+y^2=17)}}}