#### Answer

For an algebraic expression, a rational expression is an expression which can be expressed in the form $\frac{p}{q}$; here, both $p\ \text{and }q$ are polynomials and the denominator $q\ne 0$.

#### Work Step by Step

The quotient of two algebraic polynomials is called a rational expression.
For an example, $\frac{x+5}{{{x}^{2}}+x+1}$
Here the numerator is $x+5$ and the denominator is ${{x}^{2}}+x+1$ and ${{x}^{2}}+x+1\ne 0$.
Also, take, $\frac{{{x}^{2}}+3x+2}{x+3}$
Here, the numerator is ${{x}^{2}}+3x+2$ and the denominator is $x+3$ and $x+3\ne 0$.