$\"\"$

\

The expression is $\"\"$ .

\

The expression is to be defined only when $\"\"$ .

\

Let $\"\"$ .

\

$\"\"$

\

The above expression is in the form of $\"\"$ .

\

$\"\"$ .

\

$\"\"$ .

\

Therefore the factored form of $\"\"$ is $\"\"$ .

\

The real zeros of $\"\"$ are

\

$\"\"$

\

$\"\"$

\

Therefore $\"\"$ has $\"\"$ real zeros at $\"\"$ and $\"\"$ .

\

Create a sign chart using the values $\"\"$ and $\"\"$ .

\

$\"\"$

\

Note : The solid circle denote that the value are included in the solution set.

\

Determine whether $\"\"$ is positive or negative on the test intervals.

\

Test intervals are $\"\"$ and $\"\"$ .

\

If $\"\"$ then $\"\"$ .

\

If $\"\"$ then $\"\"$

\

If $\"\"$ then $\"\"$ .

\

The solutions of $\"\"$ are $\"\"$ values for which $\"\"$ is positive or equal to $\"\"$ .

\

The solution set is $\"\"$ .

\

Therefore the domain is $\"\"$ .

\

$\"\"$

\

The domain is $\"\"$ .