$\"\"$

The function is $\"\"$ .

Write the function in vertex form.

$\"\"$ (Original function)

$\"\"$ (Group $\"\"$ and factor, dividing by $\"\"$ )

$\"\"$ (Complete the square)

$\"\"$ (Write $\"\"$ as a perfect square)

$\"\"$ . $\"\"$

Vertex form of the function $\"\"$ is $\"\"$ .