Geo4.113

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Find the equation of the radical axis of the circles 3x^{2}+3y^{2}-7x+8y+11=0,x^{2}+y^{2}-3x-4y+5=0\,

The equation of the radical axis is

(x^{2}+y^{2}-x{\frac  {7}{3}}+y{\frac  {8}{3}}+{\frac  {11}{3}})-(x^{2}+y^{2}-3x-4y+5)=0\,

x({\frac  {-2}{3}})+y({\frac  {20}{3}})-{\frac  {4}{3}}=0\,

-2x+20y-4=0\,

x-10y+2=0\,


Main Page:Geometry:Circles