lean_workbook_plus_22243

Proved

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

Calculate $\left(\sqrt{\left(17-\sqrt{2}\right)\left(17+\sqrt{2}\right)}-10\right)\left(\sqrt{\left(17-\sqrt{2}\right)\left(17+\sqrt{2}\right)}+10\right)$ .

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_22243 (h : 0 < √2) : (Real.sqrt ((17 - √2) * (17 + √2)) - 10) * (Real.sqrt ((17 - √2) * (17 + √2)) + 10) = 187   :=  by sorry

Source

https://huggingface.co/datasets/internlm/Lean-Workbook

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