Ответы на вопрос:
4x^3 - 5x - 1 = 0 4x^3 - 4x - x - 1 = 0 4x*(x^2 - 1) - (x + 1) = 0 4x*(x - 1)(x + 1) - (x + 1) = 0 (x+1)*(4x^2 - 4x - 1) = 0 d=16+4*4 = 32 x + 1 = 0 x₂ = (4-4√2)/8 = (1 - √2) / 2 x₁ = -1 x₃ = (1 + √2) / 2
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