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Surds: Dividing by Negative Numbers

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    (Original post by Mr M)
    Wasn't ever unhappy. TenOfThem and I are maths teachers - GCSEs had not been invented when we were at school if that explains the dinosaur reference.
    Oh okay, sorry for sounding rude ^^ What level do you teach at?
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    (Original post by TheWantedGuy)
    Oh okay, sorry for sounding rude ^^ What level do you teach at?
    KS3, GCSE and A Level.
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    Hey,

    I've got another question about Surds... if you don't mind helping lol xD

    7(sq root of 5) + 15 / 5, can you cancel down the 15 with the 5, to make it: 7(sq root of 5) + 3, or can you only do it when the whole thing is divisible by the denominator, in this case, including 7?

    Cheers.
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    (Original post by TheWantedGuy)
    Hey,

    I've got another question about Surds... if you don't mind helping lol xD

    7(sq root of 5) + 15 / 5, can you cancel down the 15 with the 5, to make it: 7(sq root of 5) + 3, or can you only do it when the whole thing is divisible by the denominator, in this case, including 7?

    Cheers.
    no ... as you say the 7 is not divisible by 5
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    (Original post by TenOfThem)
    no ... as you say the 7 is not divisible by 5
    Thought so.

    Thanks.

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