This lesson is about taking the square root - the opposite of squaring numbers.

You square a number when you multiply the number by itself.

To square **5**,
multiply **5 x 5 = 25, or 5 ^{2}=25.**

If you form a square with
3 tiles on each side, you will use 9 tiles. This shows that 3^{2}=9.

The area of the square
is 3 x 3, or 3^{2, or 3 squared.}

The opposite, or inverse,
of squaring a number is taking the **square root**.

The symbol is used to indicate nonnegative square roots.

Example:

1. What
is
6^{2}? 36

2. What is ? 9

3. Try
this out. What other number, besides 9, can you square
to get 81? -9 (because
-9 x -9 = 81 or -9^{2=81}^{.)}

**SQUARE
ROOT CALCULATOR**

Copyright © June 2002 by Analyn A. Alquitran