$\"\"$

The equation is $\"\"$ .

Isolate and group like terms.

$\"\"$

To change the expressions $\"\"$ and $\"\"$ into a perfect square trinomial, $\"\"$ and $\"\"$ to each side of the equation.

$\"\"$

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

Because the equation is of the form $\"\"$ , the graph is an ellipse with center $\"\"$ .

$\"\"$

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

Because the equation is of the form $\"\"$ , the graph is an ellipse with center $\"\"$ .