What is the following sum? 5 (3 sqrt x) + 9 (3 sqrt x) ?

For this case we have the following expression:

5 (3sqrt x) + 9 (3 sqrt x)

We can do common factor of the term that is repeated in both parts of the expression.

The term that is repeated is:

(3 sqrt x)

Rewriting we have:

(3 sqrt x) * (5 + 9)

(3 sqrt x) * (14)

14 (3 sqrt x)

Answer:

14 (3 sqrt x)

5 (3√x) + 9 (3√x) = 15√x+27√x = 42√x

5∛x + 9∛x = 14∛x