Prove2Me

lean_workbook_plus_74968

Proved

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

Find the roots of the quadratic equation 34x2−13x−21=034x^2-13x-21=0.

Preamble
import Mathlib.Analysis.Complex.Basic
Formal statement
theorem lean_workbook_plus_74968 (x : ℝ) : 34 * x ^ 2 - 13 * x - 21 = 0 ↔ x = -21 / 34 ∨ x = 1   :=  by sorry
Source
https://huggingface.co/datasets/internlm/Lean-Workbook

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