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Square root

The square root of the number a means looking for a number that when squared gives a. You write it as

 

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Explanation

Here we have the well known 2^nd root, called the square root. On your calculator you can see

You can write roots as powers

and this explains what a root really is, as

Now we multiply roots

When dividing, we avoid having roots in the denominator

and that looks better.

 

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