# Maths GCSE surds help!!!

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#1
Does anyone have an easier way of doing these.
0
4 years ago
#2
(Original post by Zaspo)
Does anyone have an easier way of doing these.
Depends what you define as easy, the easiest way I see is using rationalising the denominator methods.

Multiply numerator and denominator by 1-(1/root2) and them simplify down.
0
4 years ago
#3
Didn't you watch any videos if not watch Primrose kitten she explains things in the simplest way
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#4
(Original post by kate426)
Didn't you watch any videos if not watch Primrose kitten she explains things in the simplest way
I know how to do surds but just can,t get my head around this one for some reason.
0
4 years ago
#5
(Original post by Zaspo)
I know how to do surds but just can,t get my head around this one for some reason.
Simply the denominator, and then work from there - rationalising the denominator, using the concept of the difference of two squares.
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#6
(Original post by ns_2)
Simply the denominator, and then work from there - rationalising the denominator, using the concept of the difference of two squares.
Would you be able to post an answer.
0
4 years ago
#7
Rationalise the fraction in the denominator to get and multiply the whole fraction by .
Or, if the fractions are what's causing the problems, replace it with
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4 years ago
#8
(Original post by Zaspo)
Would you be able to post an answer.
Start off by working out this:

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4 years ago
#9
Rationalise 1/ root2
Then rationalise again by multiplying by the opposite sign of the fraction
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#10

Got it thanks everyone!!! 😂😀
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