6 * Х³ - 13 * Х² + 4 = 0
6 * Х³ - 13 * Х² + 6 * Х - 6 * Х + 4 = 0
Х * (6 * Х² - 13 * Х + 6) - (6 * Х - 4) = 0
Х * (2 * Х - 3) * (3 * Х - 2) - 2 * (3 * Х - 2) = 0
(3 * Х - 2) * (2 * Х² - 3 * Х - 2) = 0
(3 * Х - 2) * (2 * Х + 1) * (Х - 2) = 0
Х₁ = -1/2 X₂ = 2/3 X₃ = 2