# Surds

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• Created by: Hummi C
• Created on: 21-05-12 21:01

These roots have exact values and are called rational

√36 = 6

√144 = 12

These roots do NOT have exact values and are called irrational, or SURDS

√2 ≈ 1.41

√21  2.76

Surd rules

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you've put an s before the square root sign on the 5th line

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Whoops, thanks for the correction! :D

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This helped a lot! You did a better job than my teacher :P Thank you!

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THANK YOU  I didn't understand it at all and I think I might now :D

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A good set of notes and examples, well explained

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If √2 + √3 DOES NOT = √5

then what is it?

Thanks

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Dawid B     you just cant do it- you leave it how it is

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I have a maths exam next week and this helped me so much!

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really good useful website and really helped for exams

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damn nice 1 b

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this helps thankyou :)

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thank so much understand it now

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That's a good start...  It gets fun when we want to simplify fractions with Surds on the bottom (the denominator) .  There is a rule that the 'simple' form should not as a surd on the bottom.

So to simplify  6/Root(3)   we multiply  top and bottom by root(3)  , as Root(3) * root(3)  = 3.

We get 6root(3)/3   = 2Root(3)

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