Answer: None of those answers are the simplified form of that radical.
The simplified form would be 3 [tex]\sqrt{2}[/tex] or [tex]\sqrt{18}[/tex] in decimal form.
Step-by-step explanation:
I got the simplified version of sqr root 18 very easily.
First I broke it up into sqr root 9 * sqr root 2
I simplified sqr root 9 as 3 and then left sqr root 2 alone as it cannot be simplified further
That is how I got my answer of 3 [tex]\sqrt{2}[/tex]