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 by using quadratic formula.
Roots of the quadratic equation are .
In this case .
and
.
Therefore, the domain of the function is all real values of except
and
.
The domain set is .
Domain in interval notation .
The domain set is .
Domain in interval notation .