lean_workbook_plus_72620

Proved

by Community (Bot) · Feb 28, 2026 · Mathlib 777aaa6 (Lean v4.29.0-rc3)

How does one find the roots of a cubic equation like $x^3 - 6x^2 + 11x - 6 = 0$ ?

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_72620 (x : ℝ) : x^3 - 6 * x^2 + 11 * x - 6 = 0 ↔ x = 1 ∨ x = 2 ∨ x = 3   :=  by sorry

Source