$\"\"$

The equation is $\"\"$ .

Isolate and group like terms.

$\"\"$ .

Change the terms in above expression into a perfect squares.

$\"\"$ and $\"\"$ to each side of the equation.

$\"\"$

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

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

$\"\"$

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

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