Answer:
[tex]2\sqrt{21}[/tex]
Step-by-step explanation:
We can multiply the two irrational terms, getting [tex]\sqrt{84}[/tex].
We see that 4 is a factor of 84, so we can rewrite [tex]\sqrt{84}[/tex] as [tex]\sqrt{4 (21) }[/tex]. We can take the 4 out, getting [tex]2\sqrt{21}[/tex].
