Rational numbers can be represented by a/b, where a and b are integers.

are examples. If you write it in decimal form, it is either terminating, e.g. 1/2=0.5 or non-terminating but repeating, e.g. 1/3=0.333333....

IRRational numbers, when represented in decimal form is non-terminating and non-repeating. It cannot be represented as a/b for any integers a,b. Examples are

Polynomials are of the form where x are variables or indeterminates and are real numbers and x are natural numbers. For example, . Here, .

NOte that the exponents of x should be natural numbers for it to be a polynomial