Math links

The Three Cases

Here are the three results we just got:

(a+b)2  = a2 + 2ab + b2 } the "perfect square trinomials"
(a−b)2  = a2 − 2ab + b2
a2 − b2 (a+b)(a−b)   the "difference of squares"

Remember those patterns, they will save you time and help you solve many algebra puzzles.

(a+b)² = a²+2ab+b² - But Why?  https://www.youtube.com/watch?v=49_TJymgXgM

(a−b)2   https://www.youtube.com/watch?v=TsaH0GR15V4

a2 − b2    https://www.youtube.com/watch?v=24gWbMSEVVw

 

a^2 - b^2 = (a+b)* (a-b)    https://www.quora.com/What-is-the-formula-of-a-2-b-2           https://www.youtube.com/watch?v=24gWbMSEVVw

Recognizing Patterns https://www.mathsisfun.com/algebra/special-binomial-products.html  (a+b)2

 

https://www.mathsisfun.com/algebra/special-binomial-products.html

https://mste.illinois.edu/dildine/times/diff2sq.pdf