(two x to the sixth power) (3x to the 1/2power)

The first step for solving (2) × (3) is to remove the first set of parenthesis
2 × (3)
then remove the second set of parenthesis 
2 × 3
calculate the product of the two numbers
6
using  =  ,, transform the expression
6
finally,, simplify the radical 
6√x
this means that the correct answer to your question is 6√x
let me know if you have any further questions
:)