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# The Square Numbers

When an integer is multiplied by itself, the resulting product is called a square number.

The square of 3 is

The square of 1 is

The square number of -5 is

The square of 1.5 is

The first few square numbers are:

1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, …

## Square Numbers

The square of a number is the result of multiplying the number by itself. So, the square of 3 is 3×3,written as 3^2, which is equal to 9. The square of is ,written as , which is .

The first few squares of the integers are

On the other hand, the square root of a number, written √number, is the number we has before squaring. Since , we say . But is also equal to , so \sqrt .

, and so on.