Math Help - Surds

1. Surds

hey guys so im kinda stuck on surds again

umm how can you tell what is a surd and what isnt a surd?

and how are they irrational or not

thanks.

2. Originally Posted by coldplayroxs
hey guys so im kinda stuck on surds again

umm how can you tell what is a surd and what isnt a surd?

and how are they irrational or not

thanks.

First of all , irrational numbers are numbers which cannot be expressed in the form $\frac{m}{n}$ , where m and n are integers . Examples of irrational numbers are $\sqrt{2}$ and
$2\sqrt{3}+\sqrt{5}$ . Thus , irrational numbers such as these are also called surds .