Monthly Archives: December 2019

A new counting system

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

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A simple proof of the quadratic formula

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

(This variant was requested by Mark Dominus.)

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Post without words #28

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