solve square root of 72x to 3 power divided by 8x

The question is ambiguous, check that the question is as I interpreted before looking at the answers.

√((72x)³/8x)
=√(8³9³x³/8x)
=√(8²3^6x²)
=√((8*3³x)²)
=8*3³|x|
=216|x|