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New best story on Hacker News: A visual proof that a^2 – b^2 = (a + b)(a – b)

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New best story on Hacker News: A visual proof that a^2 – b^2 = (a + b)(a – b) New best story on Hacker News: A visual proof that a^2 – b^2 = (a + b)(a – b) Reviewed by aad on 23:22 Rating: 5

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