Answer:
3[tex]\sqrt{6}[/tex]
Step-by-step explanation:
using the rule of radicals
[tex]\sqrt{a}[/tex] × [tex]\sqrt{b}[/tex] ⇔ [tex]\sqrt{ab}[/tex]
[tex]\sqrt{54}[/tex]
= [tex]\sqrt{9(6)}[/tex] = [tex]\sqrt{9}[/tex] × [tex]\sqrt{6}[/tex] = 3[tex]\sqrt{6}[/tex]