Answer:
750720
Step-by-step explanation:
Assuming your original expression was 3√(27x¹⁸), the answer is 9x⁹√(3).
We split up the radicand into perfect squares. Once we do, we take out the things that were squared:

The answer is c. i took this test
Evaluate
remember that x^0=1
and x^-m=1/(x^m)
simplify
PEMDAS
parenthasees exponentes mulitplciraon or diviosn additon or subtraction
parethasees first
inside to ut
lef to right
7*5*2/7*3
70/21
10/3
then in the next partnheasees
5^0/2^-3 times 2^-9
1/(1/2^3)(1/2^9)
1/(1/8)(1/512)
8/512
1/64
so now we have
(10/3)^2 times 1/64
100/9 times 1/64
100/576
25/144
you should group them better so it is easier to read