Нигде не дан правильный ответ...
x^2 + x - 1 = 0
D = 1^2 + 4 = 5
x = (-1 sqrt(5))/2
x= [(-1-sqrt(5)/2 ; (-1+sqrt(5))/2]
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Нигде не дан правильный ответ...
x^2 + x - 1 = 0
D = 1^2 + 4 = 5
x = (-1 sqrt(5))/2
x= [(-1-sqrt(5)/2 ; (-1+sqrt(5))/2]