Geo4.112

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Find the equation to the radical axis of the two circles x^{2}+y^{2}+10x-4y-1=0,x^{2}+y^{2}+5x+y+4=0\,

The equation to the radical axis of two circles S and S1 is

S-S_{1}=0\,

Therefore,the equation of radical axis is

(x^{2}+y^{2}+10x-4y-1)-(x^{2}+y^{2}+5x+y+4)=0\,

10x-4y-1-5x-y-4=0\,

5x-5y-5=0\,

x-y-1=0\,


Main Page:Geometry:Circles