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    Can someone please explain to me adding and subtracting surds at a complex level? Thank you (:
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    it's been a while since I did surd's but if I remember right you treat them like you would fractions.
    the root has to be the same (like denominators have to be the same).
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    what level we talking - GCSE's I can help
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    (Original post by Kate Giddy)
    Can someone please explain to me adding and subtracting surds at a complex level? Thank you (:
    As ruthieg101 has said, to add or subtract surds you must first simplify them
    e.g. root(32)-root(2)
    root(32)=root(16 x 2)=root(16) x root(2)=4 x root(2)=4root(2)
    root(32)-root(2)=4root(2)-root(2)=3root(2)

    to simplify a fraction with a surd in the denominator you have to know how to rationalise it

    For more detailed explanations and examples have a look at the surds topics on the mathsgenie.co.uk revision site
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    (Original post by Kate Giddy)
    Can someone please explain to me adding and subtracting surds at a complex level? Thank you (:
    it is absurd to expect a good answer without specifying further what you are after
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    Thankyou this has really helped(:
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