Help!!!! radical? im a little confused ?

Question

ok when you have radical 3x to the forth power and you multiply it by radical 9x to the 3rd power would it be 3x to the power of 6th or would it be 3x to the 3rd power radical 3x

this is in my own words and no it is not multiple choice

Answer 1

And if the parentheses are placed as so:

sqrt(3x)^4 * sqrt(9x)^3

sqrt(81x^4) * sqrt(729x^3)

9x^2 * 27x^1.5

243x^3

Answer 2

3x^4 under a radical would become x^2 radical 3

9x^3 under a radical would become 3x radical x

(x^2 radical 3) x (3x radical x)  =    3x^3 radical 3x