Monthly Archives: December 2019

A new counting system

Posted on December 30, 2019 by Brent

0 = t__ough 1 = t_rough 2 = th_ough 3 = through So, for example, trough through tough though though. English is so strange.

Posted in arithmetic, counting | Tagged , , , | 1 Comment

A simple proof of the quadratic formula

Posted on December 23, 2019 by Brent

If you’re reading this blog you have probably memorized (or used to have memorized) the quadratic formula, which can be used to solve quadratic equations of the form But do you know how to derive the formula? Usually the derivation … Continue reading →

Posted in algebra, proof | Tagged , , , , | 3 Comments

Post without words #29

Posted on December 11, 2019 by Brent

(This variant was requested by Mark Dominus.)

Posted in posts without words | Tagged , , , , | 2 Comments

Post without words #28

Posted on December 9, 2019 by Brent
Posted in posts without words | Tagged , , | 12 Comments