What is simplest radical form

What is it and how would you put the square root of 13 into it?

Expressing in simplest radical form just means simplifying a radical so that there are no more square roots, cube roots, 4th roots, etc left to find. It also means removing any radicals in the denominator of a fraction.

sqrt 13 is the simplest form

Usually, to simply a radical, you would break the number down into at least one square, and have a prime number left over.

For example: /8 breaks down to /4*2 then the square root of 4 is 2, so 2 goes on the outside and another 2 on the inside: 2/2.

since 13 is prime, that is simplest radical form.

Since 13 is a prime number, √13 is already is simplest radical form.