# Is the square root of 25 an integer because it equals 5 which is an integer?

Jun 11, 2015

An integer is also called a whole number .

#### Explanation:

It is not usual for square roots to be integers.
This only happens if the number under de root is a square.
This is because square-rooting is just the opposite operation from squaring.

$\sqrt{x}$ means: give me the number of which $x$ is the square.

Example with non-integer:
$\sqrt{2} = 1.414213562 \ldots$ (this goes on, but NO calculator can give all the decimals), because $1.414213562 {\ldots}^{2} = 2$