Factoring Trinomials using the "Criss Cross" Method

      - a critical tool for success in PC Math 11 and 12)

      - note: other methods are great, but I will use this particular method in class

Factoring "Difference of Squares"

   - Use this method only when...

        - you have two terms in your expression (a binomial)

        - each term is a perfect square 

       - there is subtraction between the two terms (this is called a "difference")

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