lean_workbook_plus_53267

Proved

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

Prove that $2(a^2+b^2+c^2)+6\ge 4(a+b+c)$

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_53267 (a b c: ℝ): 2 * (a ^ 2 + b ^ 2 + c ^ 2) + 6 ≥ 4 * (a + b + c)   :=  by sorry

Source