simplify.\n3\\sqrt{27}

Explanation:

Step1: Simplify the square - root

Find the square - root of 27. We know that $27 = 9\times3$, and $\sqrt{27}=\sqrt{9\times3}=\sqrt{9}\times\sqrt{3}=3\sqrt{3}$.

Step2: Multiply by 3

Multiply the result by 3. $3\times\sqrt{27}=3\times3\sqrt{3}=9\sqrt{3}$.

Answer:

$9\sqrt{3}$