Question

очень прошу

х³-2х²+1=0​

Answer 1

x³ - 2x² + 1 = 0
x³ - x² - x² + 1 = 0
x²(x - 1) - (x² - 1) = 0
x²(x - 1) - (x - 1)(x + 1) = 0
(x - 1)(x² - x - 1) = 0
x₁ = 1
x² - x - 1 = 0
D = 5
x₂ = (1 + √5)/2
x₃ = (1 - √5)/2