Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

$$\text{Domain: All Real Numbers Except -1 and -2}$$
We see that the given function is in the form $f(x)=\frac{p(x)}{q(x)}$, since the values in the numerator and the denominator are functions. Thus, this is a rational function. Since rational functions do not exist when the denominator is equal to zero, it follows: $$\text{Domain: All Real Numbers Except -1 and -2}$$