Answer:
[tex]3\sqrt{211}[/tex]
Step-by-step explanation:
The radical 1899 is equal to [tex]\sqrt{1899}[/tex].
We can see that 1899 is divisible by 9, which is a perfect square, so we have [tex]\sqrt{9 (211)}[/tex].
We can take out the 9 since it is a perfect square, getting [tex]3\sqrt{211}\\[/tex].