$\"\"$

The equation of the sphere is $\"\"$ .

The general form of a sphere with center $\"\"$ and radius $\"\"$ is $\"\"$ .

Convert the equation into general sphere equation.

$\"\"$

Add $\"\"$ on both sides of the equation.

$\"\"$

Compare the obtained equation with general equation of a sphere.

Center $\"\"$ .

Radius $\"\"$ .

$\"\"$

Center of the sphere is $\"\"$ and Radius of the sphere is $\"\"$ .