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    Thanks! Name:  ImageUploadedByStudent Room1363469090.860881.jpg
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    you should be able to take an appropriate root out of the denominator
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    Root63

    Is equivalent to Root9*Root7
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    (Original post by TenOfThem)
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    you should be able to take an appropriate root out of the denominator
    Well yes but I think the OP is expected to rationalise the denominator too.
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    (Original post by Mr M)
    Well yes but I think the OP is expected to rationalise the denominator too.
    probably
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    The answer is apparently root 7 over 7


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    (Original post by JodieW)
    The answer is apparently root 7 over 7
    Yes, that is the answer
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    Yeah, I don't know how to get to it.


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    (Original post by JodieW)
    Yeah, I don't know how to get to it.
    The advice in post 2, using the hint in post 3, followed by the advice in post 4
 
 
 
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