Пожалуйста помогите x^3+2x^2-4x-8=0. Created by lotkova1998. algebra-ru

Пожалуйста помогите x^3+2x^2-4x-8=0...

lotkova1998 @lotkova1998

July 2022 1 13 Report

Пожалуйста помогите
x^3+2x^2-4x-8=0

Answers & Comments

nKrynka Решение
x³ + 2x² - 4x - 8=0
x²(x + 2) - 4(x + 2) = 0
(x + 2)(x² - 4) = 0
x + 2 = 0 или x² - 4 = 0
x₁ = - 2 x² = 4
x = - √4
x₂ = - 2
x = √4
x₃ = 2
Ответ: x = - 2; x = 2

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