Lesson BASICS - Radicals/Surds

Introduction
Radicals or surds... these are the roots eg square roots.

Manipulation of radicals is very simple and "almost" good fun. There are only a few things to know and the best way to show them is through examples:

BASICS
Q Simplify
A



Q Simplify
A



Fractional Radicals
Mathematicians do not like to have a square root on the denominator, so we tend to "rationalise the denominator", eg

Q simplify
A



Q simplify
A we need to rationalise the denominator and also simplify the radicals/surds.

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