$\"\"$

The equation is $\"\"$ .

Isolate and group like terms.

$\"\"$

$\"\"$ .

Change the terms in above expression into a perfect squares.

$\"\"$

Divide on each side by $\"\"$ .

$\"\"$ .

The standard form of equation is $\"\"$ .

The equation is of the form $\"\"$ , the graph is a circle with center $\"\"$ .

$\"\"$

The standard form of equation is $\"\"$ .

The graph is a circle with center $\"\"$ .