Chapter 1 - P.S. Problem Solving - Page 158: 12c

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Cube roots of 1 are {$(\frac{-1+1\sqrt 3i}{2})$, 1 , $(\frac{-1-1\sqrt 3i}{2})$} Cube roots of 8 are {$2(\frac{-1+1\sqrt 3i}{2})$, 2 , $2(\frac{-1-1\sqrt 3i}{2})$} Cube roots of 64 are {$4(\frac{-1+1\sqrt 3i}{2})$, 4 , $4(\frac{-1-1\sqrt 3i}{2})$}