I normally prefer the phrase “by using the distributive law” instead of the more colloquial “by FOIL,” but I’ll make an exception in this case.

# Your Plan is Foiled

Tagged distributive law

*Posted by John Quintanilla on February 10, 2016*

https://meangreenmath.com/2016/02/10/your-plan-is-foiled/

Leave a comment

### 1 Comment

### Leave a Reply Cancel reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.

## Top Posts & Pages

- Square roots and logarithms without a calculator (Part 3)
- Powers Great and Small
- Engaging students: Finding the domain and range of a function
- Engaging students: Using the undefined terms point, line, and plane
- Engaging students: Translation, rotation, and reflection of figures
- My Mathematical Magic Show: Part 7
- Student misconceptions about PEMDAS
- Engaging students: Slope-intercept form of a line
- Infraction
- Thoughts on Silly Viral Math Puzzles

## Archives

- February 2019
- January 2019
- December 2018
- November 2018
- October 2018
- September 2018
- August 2018
- July 2018
- June 2018
- May 2018
- April 2018
- March 2018
- February 2018
- January 2018
- December 2017
- November 2017
- October 2017
- September 2017
- August 2017
- July 2017
- June 2017
- May 2017
- April 2017
- March 2017
- February 2017
- January 2017
- December 2016
- November 2016
- October 2016
- September 2016
- August 2016
- July 2016
- June 2016
- May 2016
- April 2016
- March 2016
- February 2016
- January 2016
- December 2015
- November 2015
- October 2015
- September 2015
- August 2015
- July 2015
- June 2015
- May 2015
- April 2015
- March 2015
- February 2015
- January 2015
- December 2014
- November 2014
- October 2014
- September 2014
- August 2014
- July 2014
- June 2014
- May 2014
- April 2014
- March 2014
- February 2014
- January 2014
- December 2013
- November 2013
- October 2013
- September 2013
- August 2013
- July 2013
- June 2013

## Categories

- Algebra I (171)
- Algebra II (273)
- Bases (43)
- Calculus (225)
- Chemistry (9)
- Computer science (9)
- Discrete mathematics (217)
- Elementary (149)
- Engagement (676)
- Geometry (208)
- Guest presenter (402)
- History (52)
- Humor (236)
- News Clips (115)
- Physics (35)
- Popular Culture (214)
- Pre-Algebra (153)
- Precalculus (490)
- Preparing for college (12)
- Probability (82)
- Statistics (78)
- Tales from the Classroom (210)
- Technology (75)
- Theorems (152)
- Uncategorized (56)

## Tags

angle arccosine arcsine arctangent area bag of tricks binary circle combinatorics Common Core complex numbers compound interest conceptual barrier confidence interval convex polygons cosine decimal De Moivre's Theorem derivative differential equation distributive law divisibility division algorithm e exponent exponential factorial factoring fraction function gamma geometric series graph high-stakes testing hypothesis test index to a series of posts induction integral inverse function law of cosines law of sines limit logarithm logic MAA magic trick matrices multiplication Pascal's triangle perpendicular pi polar coordinates polynomial primes PRIMUS proof Pythagorean theorem Pythagorean trig identities quadratic formula residue sequence series sine slope sports square root system of equations tangent Taylor series textbook problems triangle trigonometry unsolved problems volume xkcd## Meta

## howardat58

/ February 10, 2016In the olden days we called it “expand the brackets. It made sense. The popular explanation of the distributive law is very bad, see my post on this:

https://howardat58.wordpress.com/2015/01/21/more-bad-language-in-math/