How to Square A Number
To square a number, just multiply it by itself ...
"Squared" is often written as a little 2 like this:
This says "4 Squared equals 16"
(the little 2 says the number appears twice in multiplying)
Squares From 02 to 62
| 0 Squared | = | 02 | = | 0 × 0 | = | 0 |
| 1 Squared | = | 12 | = | 1 × 1 | = | 1 |
| 2 Squared | = | 22 | = | 2 × 2 | = | 4 |
| 3 Squared | = | 32 | = | 3 × 3 | = | 9 |
| 4 Squared | = | 42 | = | 4 × 4 | = | 16 |
| 5 Squared | = | 52 | = | 5 × 5 | = | 25 |
| 6 Squared | = | 62 | = | 6 × 6 | = | 36 |
| The squares are also on the Multiplication Table: |  |
Negative Numbers
We can also square negative numbers.
That was interesting!
When we square a negative number we get a positive result.
Just the same as squaring a positive number:
(For more detail read Squares and Square Roots in Algebra)
Square Roots
A square root goes the other way:
3 squared is 9, so a square root of 9 is 3
A square root of a number is ...
... a value that can be multiplied by itself to give the original number.
A square root of 9 is ...
... 3, because when 3 is multiplied by itself we get 9.
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