- Combining Like Terms Part 1 – Khan Academy
Combining Like Terms Part 2 – Khan Academy
Combining Like Terms Part 3 – Khan Academy
Adding Polynomials – Khan Academy
Adding Polynomials with Multiple Variables – Khan Academy
Subtracting Polynomials – Khan Academy
Subtracting Polynomials with multiple variables – Khan Academy
How to Add, Subtract and Multiply Polynomials
http://study.com/academy/lesson/how-to-add-subtract-and-multiply-polynomials.html
http://study.com/academy/lesson/how-to-add-subtract-and-multiply-polynomials.html