Ответы на вопрос:
X³ - 4x² - 7x + 28 = 0x²(x - 4 ) - 7(x - 4) = 0 (x - 4)*(x² - 7) = 0 x - 4 = 0 x₁ = 4 x² - 7 = 0 x² = 7 x₂ = - √7 x₃ = √7
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