24 contains the perfect square 4 as a factor, so write 24 as 4*6
Any even power of a letter is a perfect square, so
1. since
is an even power of a letter, we leave it as it is right now.
2. since
is an odd power of a letter, we write it as the largest even
power times the letter to the first power, so write it as 
or just 
3. since
is an odd power of a letter, we write it as the largest even
power times the letter to the first power, so write it as
, or just
So
becomes
or making it colorful:
The ones I have colored red come out out of the radical
and the ones I have colored green stay underneath.
When we take the square root of the 4 we write 2 in front
of the radical. When we take the square root of the
even power of a letter out front we must divide the even
exponent by 2:
or just
Edwin