Question

How do you simplify `sqrt(5a) * sqrt(15a)`?

Answer 1

`sqrt(5a)*sqrt(15a)` can be also changed to this form `sqrt(5a*15a)`

Now, we have all under one `sqrt`. We can multiply `5a` with `15a`, which gives us `75a^2`
We put this under `sqrt` and we get `sqrt(75a^2)`

This can be changed into

`8.660254a^2` `=>` `5sqrt(3)*a^2`