Use this rule:----------- 



Use this rule:-----------    
on both terms above being very careful to put the
results of the second term in parentheses because
it has a minus sign in front of it, which will 
change the signs:


 
Now remove the prentheses:



Use this rule:----------- 
on the last term:



-----------------------------------------------------

Write that as



The index is 3 (cube root),
we make as many groups of three like factors
as we can and leave the others ungrouped, like
this:



We were only able to make one group in this
problem but in other problems you can make more
groups.

The TRIPLE  comes out in front as a 
SINGLE  and the other factors stay underneath
the radical:



Then you write the {{(x*x}}} under the radical as 



------------------------------
Edwin