lean_workbook_plus_25204
ProvedProve that .
Preamble
import Mathlib.Analysis.Complex.Basic
Formal statement
theorem lean_workbook_plus_25204 (a b c d : ℝ) : (a * b + c * d) ^ 2 - (b ^ 2 + d ^ 2) * (a ^ 2 + c ^ 2) ≤ 0 := by sorry
Source
Prove that .
import Mathlib.Analysis.Complex.Basic
theorem lean_workbook_plus_25204 (a b c d : ℝ) : (a * b + c * d) ^ 2 - (b ^ 2 + d ^ 2) * (a ^ 2 + c ^ 2) ≤ 0 := by sorry