In this video you will learn how to simplify and expression with an exponent of zero and negative numbers.
Source: http://www.youtube.com/watch?v=TPK95qJCWSM
In this video you will learn how to apply exponents properties and use substitution to evaluate exponents.
Source: http://www.youtube.com/watch?v=YtZbBdFp6nw
Complete and submit for Extra Credit