Complex numbers

  1. How can i find The imaginary part of (1-2i)^2-i.

    This is what i have done so far:
    (1-2i)^2 (1-2i)^-i

    =(1-4i+4)(1-2i)^-i
     
  2. jcsd
  3. Use the polar form of 1-2i.
     
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