Answer
It makes sense
Work Step by Step
A rational expression is written in the form $\dfrac{p}{q}$, where $p$ and $q$ are polynomials.
In order to simplify, multiply, or divide rational expressions, we must know how to factor their numerators and denominators, otherwise we cannot simplify them by dividing by the common factors.
Imagine how the results of the following multiplication might look like without factoring:
$$\dfrac{x^3+x^2+x}{x^4-1}\cdot\dfrac{x^4-2x^2+1}{x^3-1}.$$
So the statement makes sense.
