Surds

Surds

1. √ab=√a X √b

   • This means when one is a square number we can get rid of it. For example. √8=√4 X √2.
     • √4=2
       • Therefore simplified we can make it equal to 2√2

2. Rationalise the denominator

   • When a surd is on the bottom we rationalise it to get it on the top.
     • We do this by X the bottom and top by the surd that is on the bottom.
       • This picture is an example of what to do.
         • https://www.youtube.com/watch?v=RecR9gV6C1I
           • This link is quite good as well

3. What is a Surd?

   • A number that cannot be shown as a decimal has it has a never ending never repeating set of decimals like pie does.

4. Try this website for some quick practice

   • http://www.bbc.co.uk/schools/gcsebitesize/maths/number/surdsrev1.shtml

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