lean_workbook_plus_9200

Proved

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

After squaring two times we get $\left( 49\,{b}^{6}+54\,{b}^{5}+155\,{b}^{4}+68\,{b}^{3}+139\,{b}^{2}+14\,b+49 \right) \left( b-1 \right) ^{2} \geq0$

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_9200 (b : ℝ) : (49 * b^6 + 54 * b^5 + 155 * b^4 + 68 * b^3 + 139 * b^2 + 14 * b + 49) * (b - 1)^2 ≥ 0   :=  by sorry

Source