$\"\"$

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

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

Convert the equation into general form of sphere equation.

$\"\"$

$\"\"$ .

Complete the squares. \ \

$\"\"$

Compare the obtained equation with general form of sphere equation.

Center $\"\"$ .

Radius $\"\"$ .

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

$\"\"$

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