Visual Proof: a² – b² = (a + b)(a – b)
2024-12-15
Futility Closet's blog post presents a visual proof of the mathematical formula a² – b² = (a + b)(a – b), quoting Sophie Germain's insightful words: “It has been said that algebra is but written geometry and geometry is but diagrammatic algebra.” The post uses an easily understood diagram to demonstrate the formula, highlighting the elegance of mathematics and the strong relationship between algebra and geometry.