The opposite of squaring a number is taking the square root. For example: - The square of 4 is 16
- The square root of 16 is 4
| The main parts of square-root expression are the radical sign and the radicand. The radical sign tells us to take the root of the radicand. |  | The table shown here lists the Squares for integers between 1 and 9. The Square Roots column shows how we can use square roots to convert the squares back to their roots. Notes - Don't bother trying to find the square root of a negative number such as:
Ö –9. The solution exists, but not in the real number system. Pre-algebra courses deal only with the real number system, so you aren't responsible for finding square roots of negative numbers. | | | Squares | Square Roots | | 12 = 1 | Ö 1 = 1 | | 22 = 4 | Ö 4 = 2 | | 32 = 9 | Ö 9 = 3 | | 42 = 16 | Ö 16 = 4 | | 52 = 25 | Ö 25 = 5 | | 62 = 36 | Ö 36 = 6 | | 72 = 49 | Ö 49 = 7 | | 82 = 64 | Ö 64 = 8 | | 92 = 81 | Ö 81 = 9 | | 102 = 100 | Ö 100 = 10 | |
on a calculator to find square roots of any real number. That way you can verify the solution to the following examples.