A visual proof that a^2 – b^2 = (a + b)(a – b)(futilitycloset.com)

634 points by beardyw 1 year ago | 174 comments

A Futility Closet blog post showing a diagrammatic visual proof that a² − b² = (a + b)(a − b), with a Sophie Germain quote.

Breakdown (2018)(futilitycloset.com)

22 points by mmastrac 2 years ago | 3 comments

Mementos(futilitycloset.com)

6 points by surprisetalk 1 year ago | 1 comments

Rivers(futilitycloset.com)

57 points by surprisetalk 1 year ago | 5 comments

Velato(futilitycloset.com)

8 points by surprisetalk 10 months ago | 2 comments

A Fuss Budget (1885)(futilitycloset.com)

45 points by beardyw 2 years ago | 13 comments