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Math Help - Vectors question

  1. #1
    Junior Member
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    Apr 2011
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    Vectors question

    Not sure if this is the correct section, but I don't know where else to put it.

    Given |a| = 3 and |b| = 5 and |a+b| = 7, determine |a - b|

    I'm not sure how to go about solving this question. The answer in the book is 4.36.

    Never mind! I was able to figure it out.
    Last edited by IanCarney; May 2nd 2011 at 03:50 PM.
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