Find the centre and radius of the circle: `x^(2)+(y-1)^(2)=2`

Find the centre and radius of the circle (x-2)^(2)+(y+5)^(2)=49

Find the centre and radius of the circle (x+2)^(2)+(y+3)^(2)=5

Find the centre and radius of the circles (x+5)^(2)+(y-3)^(2)=36

Find the centre and radius of the circles 2x^(2)+2y^(2)-x=0

The centre and radius of the circle x^(2)+y^(2)=25 is

Find the centre and radius of the circle x^(2)+y^(2)+z^(2)=9;x+y+z=3. Also find the equation of the sphere having this circle as a great circle.

Find the centre and radius of the circle x^(2)+y^(2)+z^(2)-2y-4z=11,x+2y+2z=15

Find the centre and radius of the circle 2x^(2)+2y^(2)=3x-5y+7

Find the centre and radius of each of the circle: x^(2)+(y-2)^(2)=1

Find the centre and radius of the circle x^(2)+y^(2)+2x-4y-4=0