Question

what is the square root of 21. please give the complete process.

Answer 1

There is actually no square root of 21.. it will come in point..

And that point is..4.58257569496..
The process is as follows!
.
Explanation:

√21=√3⋅7 has no square factors that can be 'moved outside the square root sign'.

For example √12=√22⋅3=√22√3=2√3

So √21 cannot be simplified.

It cannot be expressed as a rational number (fraction), so the best we can do with normal notation is to either stick with √21 or give an approximation, such as √21≈4.58.



Hope this helps you out!