$\"\"$

\

The expression is $\"\"$ .

\

Write the expression in quadratic form.

\

$\"\"$ (Original expression)

\

$\"\"$ (Rewrite the expression)

\

$\"\"$ (Write the quadratic form)

\

$\"\"$ (Difference of squares)

\

$\"\"$ (Difference of squares)

\

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

\

The quadratic expression is $\"\"$ .