$\"\"$

\

The expression is $\"\"$ .

\

Simplify the expression.

\

$\"\"$ (Original expression) \ \

\

$\"\"$ (Factors)

\

$\"\"$ (Group the factors) \ \

\

$\"\"$ (Take out common factors) \ \

\

$\"\"$ (Eliminate common factors)

\

$\"\"$ .

\

$\"\"$

\

The simplified expression is $\"\"$ .