2√4a³b³c³
Basically, find the square root of everything inside.
Let's do this in small chunks.
√4 = 2
So, take out the square, and multiply it by 2, because 2 if on the OUTSIDE of the whole radical.
So, now we have :
4√a³b³c³
Take out the square of a³, b³, and c³
4abc√abc
~Hope I helped!~