7th Grade - Factor by Grouping

In an algebraic expression, all terms collectively may not have a common factor.  In some cases, these terms can be divided into groups such that the terms in each group have a common factor.
Then we can extract the common factor to factorize the given expression.
This method of factorization is called factoring by grouping.

The video below might be helpful:
https://www.youtube.com/watch?v=rR4FfB-FZJw

Homework: Exercise 4.5 (page 111) #1 (all)
Challenge Yourself! #3