# The cube roots of $-1$ are?
$\begin{array}{1 1} -1,\large\frac{1}{2}(-1\pm i\sqrt 3) \\ -1,\large\frac{1}{2}(1\pm i\sqrt 3) \\ 1,\large\frac{1}{2}(-1\pm i\sqrt 3) \\ -1,-1,-1 \end{array}$