Chapter 5 - Polynomials and Factoring - 5.4 Factoring Perfect-Square Trinomials and Differences of Squares - 5.4 Exercise Set - Page 333: 94

Answers vary.

There are many ways to see if a polynomial is the difference of two squares, but the easiest way to do this is to see if two perfect squares are subtracted. In other words, if only two terms are being subtracted, see if both of the terms are perfect squares.