X³ + 3 * X² - 2 * X - 6 = 0
X² * (X + 3) - 2 * (X + 3) = 0
(X² - 2) * (X + 3) =
X₁ = - √ 2 X₂ = √ 2 X₃ = -3
X³ + 3 * X² - 2 * X - 6 = 0
X² * (X + 3) - 2 * (X + 3) = 0
(X² - 2) * (X + 3) =
X₁ = - √ 2 X₂ = √ 2 X₃ = -3