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Det[{{x0, 1, 1}, {x1, (-1/2+ I/2), (-1/2-I/2)}, {x2, (-1/2+ I/2)^2, (-1/2-I/2)^2}}]: Det[{{1, 1, 1}, {1, (-1/2+ I/2), (-1/2-I/2)}, {1, (-1/2+ I/2)^2, (-1/2-I/2)^2}}]
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