Basic rules

A young man pointing at his head like he's thinking.

A surd is a square root which cannot be reduced to a whole number. For example, √4 = 2 is not a surd, as the answer is a whole number.

But √5 is not a whole number. You could use a calculator to find that √5 = 2.236067977... but instead of this we often leave our answers in the square root form, as a surd.

You need to be able to simplify expressions involving surds.

Here are some general rules that you will need to learn.

${\surd ab} = \surd a \times \surd b$

$\surd a \times \surd a = a$

Now have a look at some questions.

Maths Forever

Sunday, 20 March 2016

Your SUPER FAVOURITE Surds!!!!!!!!!!!!!!!!!!

Basic rules

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