An exponential expression is one which contains an exponent. 
When working with exponential expressions, you will need to remember the rules that pertain to dealing with exponents. Algebra 2 will expect you to use these rules (forward and backward) in a variety of situations. Primarily, you will need to remember the following rules:
Product Rule:

Quotient Rule:

Power to Power Rule:

Product to Power Rule:

Simplifying Exponential Expressions: 


Simplify the following expressions into the form a•b^{x}.
Rewriting Exponential Expressions: 


You may be asked to rewrite an exponential expression in a simpler form, as seen above, to make it more easily readable. Or you may be asked to rewrite the expression into a more obscure form to reveal pertinent information about a concept or about the expression itself.