11876879
Description
Mind Map by Olivia Dawkins, updated more than 1 year ago
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Created by Olivia Dawkins
over 6 years ago
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Surds
- Rationalising the
denominator
- When a surd is on the bottom we
rationalise it to get it on the top.
- We do this by multiplying the bottom and
top by the surd that is at the bottom
- Simplify this until you have a normal equation.
- Simplify this until you have a normal equation.
- We do this by multiplying the bottom and
top by the surd that is at the bottom
- This could get you 2 - 3 marks.
- When a surd is on the bottom we
rationalise it to get it on the top.
- /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 is equal to /2.
- Therefore we can simplify /8 to 2/2
- Therefore we can simplify /8 to 2/2
- /4 is equal to /2.
- For example
/8 = /4 x /2
- This means when one is a square number we can get rid of it.
- Try this website from some quick
practise.
- http://bbc.co.uk/gcsebitesize/maths/number/surdrev1.shtml
- http://bbc.co.uk/gcsebitesize/maths/number/surdrev1.shtml
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