This algebra video tutorial explains how to factor difference of squares. It contains examples with parentheses and multiple variables.
How To Factor Trinomials: https://www.youtube.com/watch?v=-4jANGlJRSY
Factoring - Free Formula Sheet:
https://www.video-tutor.net/algebra-formula-sheet.html
Factoring - More Video Lessons:
https://www.video-tutor.net/factoring.html
Final Exam and Test Prep Videos:
https://bit.ly/41WNmI9