lean_workbook_plus_3515
ProvedPreamble
import Mathlib.Analysis.Complex.Basic
Formal statement
theorem lean_workbook_plus_3515 (x y z : ℝ) : (x + y - z) ^ 2 + (y + z - x) ^ 2 + (z + x - y) ^ 2 ≥ x ^ 2 + y ^ 2 + z ^ 2 := by sorry
Source
import Mathlib.Analysis.Complex.Basic
theorem lean_workbook_plus_3515 (x y z : ℝ) : (x + y - z) ^ 2 + (y + z - x) ^ 2 + (z + x - y) ^ 2 ≥ x ^ 2 + y ^ 2 + z ^ 2 := by sorry