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planes fly, bridges stand, semiconductors compute, and antibiotics sometimes work

x3=8x^3 = 8

Take k=0,1,2k = 0, 1, 2:

k=0:x=2k = 0:\hspace{2em}x = 2
k=1:x=2(cos⁡2π3+isin⁡2π3)=−1+i3k = 1:\hspace{2em}x = 2\left(\cos\frac{2\pi}{3} + i\sin\frac{2\pi}{3}\right) = -1 + i\sqrt{3}
k=2:x=2(cos⁡4π3+isin⁡4π3)=−1−i3k = 2:\hspace{2em}x = 2\left(\cos\frac{4\pi}{3} + i\sin\frac{4\pi}{3}\right) = -1 - i\sqrt{3}
x=2,−1+i3,−1−i3\boxed{x = 2, -1 + i\sqrt{3}, -1 - i\sqrt{3}}

hmm.... do you get it? planes fly for reasons captured well enough by our equations, while the equations may be a crude behavioural interface over a structure we are cognitively incapable of representing.