You can put this solution on YOUR website! This is a difference of two squares, which factors like this:
(First-Second)*(First + Second)
If you need more help, please see my Lesson Plans in algebra.com on Factoring the Difference of Squares, or see my own website by clicking on my tutor name "rapaljer" anywhere in algebra.com, and look for "MATH IN LIVING COLOR", then go to Chapter 2 of either Basic Algebra or Intermediate Algebra.