Question

How do you simplify `sqrt5 + 2sqrt5 + 3sqrt5`?

Answer 1

`sqrt(5) + 2 sqrt(5) + 3 sqrt(5) = (1 + 2 + 3)sqrt(5) = 6 sqrt(5)`

In general `a+2a+3a = (1 + 2 + 3)a = 6a`.