Rational Expression Definition

Rational numbers are terminating or recurring decimal numbers written in the form of fraction $\frac{a}{b}$ in which 'a' and 'b' are integers and the denominator 'b' not equal to zero. A rational expression is an expression formed using Polynomials in the form of fraction. 

i.e, $\frac{a(x)}{b(x)}$ where b(x) is a non-zero.

Some examples of rational expressions are:

          1. $\frac{2x}{3}$

          2. $\frac{x + 2}{x + 3}$

          3. $\frac{x^{2} - 2x - 2}{x + 1}$

          4. $\frac{x^{2} - 5x + 3}{(x + 1)(x + 3)}$

          5. $\frac{x + 5}{1}$