Prove2Me

An exact square-root evaluation

Proved
WorkbookSource.problem_46411

by wamlart · Sep 12, 2026 · Mathlib 0df444a (Lean v4.33.1)

lean-workbookrepaired-notationsource-checked

Compute 96×98−71×73.\sqrt{96\times 98 - 71\times 73}.

Source: InternLM Lean-Workbook, record lean_workbook_46411 (Apache-2.0). The complete source proposition and its explicit variable declarations are preserved. Notation repair: Expanded scoped notation into Nat.totient or Real.sqrt; the elaborated mathematical expression and binders are unchanged.

Preamble
import Mathlib
open Real Nat
Formal statement
theorem WorkbookSource.problem_46411 (x : ℕ) (hx: x = 5) : Real.sqrt (96 * 98 - 71 * 73) = 65  :=  by sorry
Source
https://huggingface.co/datasets/internlm/Lean-Workbook/blob/main/lean_workbook.json, record lean_workbook_46411; Apache-2.0

View graph