$\"\"$

The equation is $\"\"$ .

Take out common factor $\"\"$ from the x-terms.

$\"\"$

$\"\"$ (Complete the square on the right side)

Add and subtract 144 for we can write complete square

$\"\"$ $\"\"$

Take out common factor $\"\"$ .

$\"\"$

The above equation is similar to $\"\"$

The vertex of this parabola is located at $\"\"$ ,

The equation of the axis of symmetry is $\"\"$ .

The parabola opens upward. $\"\"$

The vertex of this parabola is located at $\"\"$

The equation of the axis of symmetry is $\"\"$ .

The parabola opens upward.