I NEED HELP ASAP IM STUCK ON THIS MATH PROBLEM AND ITS BEEN 5 MINUTES

Answer:
Correct answer: [tex]6\sqrt{6} x^3[/tex]
Step-by-step explanation:
[tex]\sqrt{216x^3}=\sqrt{216} \sqrt{x^6}[/tex]
[tex]\sqrt{216} =6\sqrt{6}[/tex], [tex]\sqrt{x^6} =x^3[/tex]
Combine: [tex]6\sqrt{6} x^3[/tex]