Use the video links below for review or practice:
Difference of Squares
https://www.youtube.com/watch?v=_qyVzH3e1dY
https://www.khanacademy.org/math/algebra/polynomial-factorization/factoring-quadratics-diff-of-squares/e/factoring_difference_of_squares_1
https://www.youtube.com/watch?v=H21qt027H48
HW: Complete WS Circuit Training (GCF & Difference of Squares).