# IntMath Newsletter: quadratic, resources, pentatonic and MathJax

By Murray Bourne, 24 Feb 2011

23 Feb 2011

In this Newsletter:

1. Math tip - Quadratic formula by completing the square - easier method

2. Resource - Curriki (a curriculum wiki)

3. More funny GraphJam graphs

4. Friday math movie: pentatonic scale

5. MathJax - render math on the Web on all browsers

6. Final thought – things that count

## Thank you!

IntMath's *Daily Math Tweet* was recognized this week in a list of Twenty Top Tweeters for Math (by Creative Education - no longer available).

Here are some of the recent Daily Math Tweets that people have found interesting:

- Using math to translate documents online (Google, Babelfish) (This is an interesting application of statistics to language, in a Washington Post article)
- Average person spends 15 minutes a day on YouTube
- Convenient summary of conics: line, circle, parabola, ellipse, hyperbola
- Blog of math-related puzzles

Follow IntMath on Twitter and please retweet anything you like there!

On with the Newsletter.

## 1. Math tip - Quadratic formula by completing the square - easier method

**Suitable for: **Everyone.

Here's an easier way to derive the Quadratic Formula using completing the square. |

## 2. Resource - Curriki (a curriculum wiki)

**Suitable for:** Students and teachers

Curriki is a place where students, parents and teachers can share learning resources.
You can easily search the site for math resources. Why not add some yourself? |

This is an important trend in education - sharing resources via wikis and social media.

## 3. More funny GraphJam graphs

**Suitable for: **Everyone.

Here are some more funny graphs courtesy of GraphJam. This is Part 2, following the ones I shared in a previous IntMath Newsletter. |

## 4. Friday math movie: pentatonic scale

**Suitable for: **Everyone.

The pentatonic scale is popular across all cultures. Some math is involved here! |

## 5. MathJax - render math on the Web on all browsers

**Suitable for: **Mostly for teachers who want to communicate with their math students in forums, blogs or in emails.

## 6. Final thought – things that count

Einstein shares a good life lesson:

Many of the things you can count don't count. Many of the things you can't count, really count. [Albert Einstein]

Until next time, enjoy whatever you learn.

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