how do you simplify the square root of 24?

i dont think you can

The square root of 24 comes out to a complicated decimal, so the simplest it can be is square root of 24.

By simplification, I think the user wants to determine the simplest radical form of $\sqrt{24}$

The first step is to find a perfect square that is also a factor of the radicand. The radicand, in case you are wondering, is the number or expression underneath the square root symbol. The factors of 24 are 1,2,3,4,6,8,12,24

The 4 is bolded because it is a factor of 24 and also a perfect square.

$\sqrt{24}=\sqrt{4*6}=\sqrt{4}\sqrt{6}$

As you can see, the square root of 4 simplifies to 2. $\sqrt{24}=2\sqrt{6}$