Question

1. Why is it useful to know the definition of rational expression? Explain through an example of your own.

Answer 1

Explanation:

Rational expressions are in the form of
`(p)/(q),q\\eq0`

Here from the definition it is very important to know that the denominator of a rational expression is never zero.

If the denominator is zero then it becomes undefined.

Let us take an example of a rational expression.

`(x+4)/(x+2)`

This is a rational expression and it is defined only when

`x+2\\eq0\\\\\Rightarrow x\\eq-2`

It means that the expression is defined for all real values of x except x =-2