The function is $\"\"$ .

All possible values of $\"\"$ is domain of the function.

The denominator of the function should not be the zero.

$\"\"$

Solve the equation $\"\"$ .

$\"\"$

Take square root each side.

$\"\"$

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

Therefore, the domain of the function is all real values of $\"\"$ except $\"\"$ and $\"\"$ .

The domain set is $\"\"$ .