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x2 + x + 1 = 0

∴ x2 + x + 1/4 = -3/4

∴ (x + 1/2)2 = -3/4

∴ x + 1/2 = ± √(-3/4)

∴ x = - 1/2 ± (i√3) / 2

∴ x = (-1 ± i√3) / 2

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15y ago

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