lean_workbook_plus_11053
ProvedProve
Preamble
import Mathlib.Analysis.Complex.Basic
Formal statement
theorem lean_workbook_plus_11053 (x y : ℝ) : (x ^ 2 + x * y + y ^ 2) * (4 / 3) ≥ (x + y) ^ 2 := by sorry
Source
Prove
import Mathlib.Analysis.Complex.Basic
theorem lean_workbook_plus_11053 (x y : ℝ) : (x ^ 2 + x * y + y ^ 2) * (4 / 3) ≥ (x + y) ^ 2 := by sorry