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Homework Help: Given a Vector addition and subtraction, how to find the Vector.

  1. Sep 16, 2012 #1
    1. The problem statement, all variables and given/known data
    Given the following Vectors: A+B= x1i + y1j and A-B= x2i + y2j
    what is A? and what is B?

    3. The attempt at a solution

    I wasn't really sure how to go about this problem. I tried setting one side to A and pluging it into the other eqn A.. however that made no sense to me.
     
  2. jcsd
  3. Sep 16, 2012 #2

    Simon Bridge

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    That would work but try z1=A+B and z2=A-B, then what is z1+z2?
    (do the A and B part as well as the i and j part)
     
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