Question

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

Answer 1

5(3√x) +9(3√x) = 15√x+27√x= 42√x

5∛x + 9∛x = 14∛x

Answer 2

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)