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4962646
Surds
Description
A very quick overview of surds with some links to help.
No tags specified
maths
gcse
surds
math
mathmatics
revise
revison
mathematics
edexcel
maths gcse
maths
core 1
as - level
Mind Map by
Thomas Marshall
, updated more than 1 year ago
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Created by
Thomas Marshall
about 8 years ago
446
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Resource summary
Surds
√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
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
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.
Try this website for some quick practice
http://www.bbc.co.uk/schools/gcsebitesize/maths/number/surdsrev1.shtml
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