lean_workbook_plus_55030
ProvedProve
Preamble
import Mathlib.Analysis.Complex.Basic
Formal statement
theorem lean_workbook_plus_55030 : ∀ x y : ℝ, 3 * (x ^ 2 + x * y + y ^ 2) ≥ (9 / 4) * (x + y) ^ 2 := by sorry
Source
Prove
import Mathlib.Analysis.Complex.Basic
theorem lean_workbook_plus_55030 : ∀ x y : ℝ, 3 * (x ^ 2 + x * y + y ^ 2) ≥ (9 / 4) * (x + y) ^ 2 := by sorry