Х^3+2х^2-5х-10=0 ........................
X³ + 2x² - 5x - 10 = 0 (x³ + 2x²) - (5x + 10) = 0 x²(x + 2) - 5(x + 2) = 0 (x + 2)(x² - 5) = 0 Ответ: