Yesterday, I blogged about a mnemonic for learning the quadratic equation. Here is an excellent video that teaches a general mnemonic technique for formula memorization:

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## How to memorize a formula

18
Sep
## Quadratic formula mnemonic

17
Sep
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## Tales from my library: Raymond Smullyan

2
May
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## Arthur Benjamin on math education

2
Apr
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Yesterday, I blogged about a mnemonic for learning the quadratic equation. Here is an excellent video that teaches a general mnemonic technique for formula memorization:

Going through some of my notes I rediscovered this mnemonic for the quadratic formula:

From square of b, take 4ac;

Square root extract, and b subtract;

Divide by 2a; you’ve x, hooray!

I am not sure of the origins of this mnemonic. The earliest version I could find was from J. S. Mackay in 1894, but he says the mnemonic was given to him by a member of the Edinburgh Mathematical Society.

Here’s another mnemonic for the quadratic formula:

And let’s not forget the Quadratic Formula Rap:

The books of philosopher, mathematician, magician, musician, Raymond Smullyan are priceless. If you are not familiar with his work, his autobiography is good place to start.

I own many books by Smullyan. Including these:

I have also been working through his book *Set Theory and the Continuum Problem*

The amazing Arthur Benjamin makes the argument that statistics, not calculus, should be the goal of mathematics education.

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