Find the roots of the polynomials $\pi(\lambda) = \lambda^{16}-10^{-16}$.

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The solution (at least it claims) is $$0.1e^{\frac{2\pi kj}{16}}, k=0,1\dots, 15.$$

How do they find this?

Graphing on Desmos it seems that upwards parabola shape seems to hit the origin at $-0.1$.