Sangeetha Pulapaka
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STEP 1: What are polynomials

STEP 2: What are fractions

https://www.ducksters.com/kidsmath/fractions_introduction.php

STEP 2: What is an expression

http://home.avvanta.com/~math/def2.cgi?t=expression

STEP 3: What is a rational expression

A rational expression is nothing more than a fraction in which the numerator and/or the denominator are polynomials. Here are some examples of rational expressions.

http://tutorial.math.lamar.edu/Classes/Alg/RationalExpressions.aspx