D. Factoring a Difference of Squares

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D. Factoring a Difference of Squares

A Difference of Squares

Expand the following expressions.  What do you notice in their expansion?

1. \(\left( {x - 2} \right)\left( {x + 2} \right)\)
   
   
   
2. \(\left( {4y - 1} \right)\left( {4y + 1} \right)\)