**Exponential Notation**

Another way to read the above example is "5 raised to the second power."

**Simplify.**

It is important to point out the last two solved problems, what is different?

The square root can be thought of as the opposite of squaring a number. In other words, if we want the square root of 16 the question is "what number squared gives 16?" Actually there are two answers to this question, 4 and −4 because:**Simplify**.

If

*A*and*B*are positive and real the following property is useful for simplifying square roots:**Video Examples on YouTube**: