#### Answer

To simplify a rational expressions, we cancel factors that are common to the numerator and denominator. So the expression $\frac{(x + 1)(x + 2)}{(x + 3)(x + 2)}$ simplifies to $\frac{x + 1}{x + 3}$.

#### Work Step by Step

We can cancel the factors (x + 2) and (x + 2) because they are common to both the numerator and denominator.