We can multiply 32 into the bracket and then write the root expressions together under a common root sign using the rule ab=ab ,
Because (26)3=22=22 and (23)3=2, we obtain
32 
a
b=ab 
32
6−3
=326−323=326−323. 6)
3=22=223)3=2326−3=
22−2=2−2. 