Решите уравнение x^3+5x^2-25x-125=0
X^2 (x + 5) - 25(x + 5) = 0 (x + 5)(x^2 - 25) = 0 (x + 5)(x - 5)(x + 5) = 0 (x - 5)(x + 5)^2 = 0 1) x - 5 = 0 x = 5; 2) (x + 5)^2 = 0 x + 5 = 0 x = - 5; Ответ: - 5; 5
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