Answers

2014-06-12T17:15:05+05:30
X² + x + 1 = 0
x² - (w+w²)x +1 =0
x² - wx - w²x +1 = 0
x(x - w) - w²(x - w) = 0
(x - w)(x- w²) = 0
x = w,w²  (here w is cube root of unity w³ = 1 & 1+w+w² = 0)
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