Hello! The answer should be B: 6i[tex] \sqrt{6[/tex] . Since the square root is above a negative, an imaginary number would come out. Because of this, you can easily recognize that it would be B.
However, if you can't, you could use the calculator to check (ignoring the negatives), 6[tex] \sqrt{6[/tex] is equal to [tex] \sqrt{216} [/tex].
The final answer should be B.
