Khan/khan-exercises — pull request #54849 by petercollingridge (2013-07-19 16:37:42+00:00)
Title: Multiplying and dividing rational expressions 5

Multiplying rational expressions with two trinomials (in total).
![multiplying and dividing rational expressions 5](https://f.cloud.github.com/assets/219302/826889/64426812-f091-11e2-84ea-f15f4e8154d8.png)