Question

What is the square root of 2 times the square root of 15?

Answer 1

`sqrt(2) xx sqrt(15)`
`color(white)("XXXX")` `= sqrt(2xx15) = sqrt(30)`

If your use of "square root" was intended to include both positive and negative roots, then
`color(white)("XXXX")`square root of 2 times the square root of 15 `= +-sqrt(30)`