Simplify 3√54 .

To simplify the expression 3√54, we can first find the prime factorization of 54.

The prime factorization of 54 is 2 * 3 * 3 * 3, or 2 * 3^3.

We can then rewrite 3√54 as 3√(2 * 3^3).

Since the cube root of 3^3 is 3 and the cube root of 2 is ∛2, we can simplify further as 3√(2 * 3^3) = 3 * 3 * ∛2 = 9∛2.

Therefore, 3√54 is equivalent to 9∛2.