Grade 10 Difference of Squares and Perfect Square Trinomials (factoring)
Channel: Ms Havrot's Canadian University Math Prerequisites
Date: 2020-05-05

How can you tell if you should use the difference of squares or perfect square trinomial factoring technique?  Recognizing which type of factoring to use is critical to success!  Don't forget to ALWAYS look for a common factor first, because sometimes it disguises a difference of squares. 
Homework page 167 and 168  There are lots more practice questions later on in this chapter as well.   The more you do, the easier they get!
http://teachers.wrdsb.ca/kathrynmcpherson/files/2017/02/Mathpower-10-Ontario-Edition.pdf