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Homework Help: Evaluating a simple complex expression

  1. Mar 1, 2012 #1
    1. The problem statement, all variables and given/known data

    ℝ(3-7i)^4

    Is this asking for just the real part of this complex expression? I suppose I could go about expanding the whole thing out, but is there a more convenient method? We've learnt a few methods, such as expressing it in polar form and such. But here the angle would be tan inverse of (-7/3) which renders it to some -66.80140949...

    which makes it pretty hard to express in nice Pi angles.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Mar 1, 2012 #2

    ehild

    User Avatar
    Homework Helper

    I think expanding is the simplest. First, expand (3-7i)^2 and simplify, then square again.

    ehild
     
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