lean_workbook_plus_23934

Proved

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

Prove that $(a+b)^2(b+c)^2\ge 2abc(a+b+c)$

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_23934 (a b c : ℝ) : (a + b) ^ 2 * (b + c) ^ 2 ≥ 2 * a * b * c * (a + b + c)   :=  by sorry

Source