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Math Help - surds

  1. #1
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    Exclamation surds

    ok i know this is simple but i cant see how to do it

    it needs to be in the for a√b (thats supposed to be a square root)

    7√2 - 3√8

    thanks
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  2. #2
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    Hello,
    Quote Originally Posted by pop_91 View Post
    ok i know this is simple but i cant see how to do it

    it needs to be in the for a√b (thats supposed to be a square root)

    7√2 - 3√8

    thanks
    Note that 8=4 \times 2

    \implies \sqrt{8}=\sqrt{4} \times \sqrt{2}=2 \sqrt{2}

    Can you finish it ?
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  3. #3
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    Question answer??

    is it √2 ??
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  4. #4
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    Quote Originally Posted by pop_91 View Post
    is it √2 ??
    Yes it is
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  5. #5
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    thanks
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