Factoring Special Polynomials

Sometimes, when you factor , you might be getting special polynomials that require some algebraic rules for expansion. This example involves 'difference of two squares'

[MarciaArleneDebra]

This was a good challenge. I worked out the first part, but did not think about further factorizing the difference of the squares. Questions like this illustrate that a lot of practice is required to see how mathematical knowledge could be used.