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

Answer :

SociometricStar

Step-by-step explanation:

Rational expressions are in the form of [tex]\frac{p}{q},q\neq0[/tex]

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.

[tex]\frac{x+4}{x+2}[/tex]

This is a rational expression and it is defined only when

[tex]x+2\neq0\\\\\Rightarrow x\neq-2[/tex]

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

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