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Math Help - negative radical simplify

  1. #1
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    bismarck, ND
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    negative radical simplify

    i feel stupid asking this im probably overthinking it..but i cant get the answer wrong so ill ask anyway..

    \sqrt{-4}*\sqrt{-49}

    if i go \sqrt{-49*-4}=\sqrt{196}=14

    however i can also go(i think) 2i*7i=14i^2=14*-1=-14

    so is the answer \pm 14? or is it one or the other....
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  2. #2
    Member
    Joined
    Oct 2007
    Posts
    209
    Order of operations tells us that exponents comes before multiplication.

    Therefore, the answer is -14.
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