Question 133

If $$\omega$$ is cube root of unity, then $$\begin{vmatrix} 1+\omega & \omega^{2} & -\omega\\ 1+\omega^{2} &ย \omega & -\omega^{2}\\ \omega^{2} +\omega& \omega& -\omega^{2} \end{vmatrix} =$$


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