x^2+y^2-2x-6y=-10
x^2+y^2-2x-6y+10=0
x^2-2x+1+y^2-6y+9=0
(x-1)^2+(y-3)^2=0
x-1=0 x=1
y-3=0 y=3
x^2005y^2=1^2005(3^2)=9