Mijlocul lui AB=O((-3+5)/2,(4+4)/2)=>O(1,4)
Fie C(x,y)
CO=Radical((x-1)^2+(y-4)^2)=6
CA=CB=>(Radical((x-(-3))^2+(y-4)^2))=(Radical(x-5)^2+(y-4)^2))=>
=>(x-1)^2+(y-4)^2=36
=>(x+3)^2+(y-4)^2=(x-5)^2+(y-4)^2=>(x+3)^2=(x-5)^2=>(+/-)(x+3)=(+/-)(x-5)=>x+3=-x+5=>x=1
(1-1)^2+(y-4)^2=36=>y=10