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Cross product question.

  1. Sep 22, 2009 #1
    1. The problem statement, all variables and given/known data

    I simply forget how to cross product if you have:

    3(A x B)

    Would it be 3A x B

    or

    A x B then take that result and multiply by 3?
     
  2. jcsd
  3. Sep 22, 2009 #2

    rock.freak667

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    Homework Helper

    r(axb) = (ra)xb = ax(rb)


    I believe it works like that for r=constant.
     
  4. Sep 22, 2009 #3
    Thank you that was my original thought.
     
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