Simplify by factoring

Question

Assume that all expressions under radicals represents non negative numbers

3square root symbol 162x8

I end up with 3x 3squareroot symbol 2x^5

I don't think this is correct help

Answer 1

I will assume you meant

3√(162x^8)
= 3√2√81√x^8
= 27√2 x^4

Answer 2

so the answer is 27 Square root symbol 2x^4