Question

What is the answer to 2 times the square root of 18?

Answer 1

+6 times the square root of 2
or
-6 times the square root of 2

Explanation:

Two times the square root of 18
can be expressed algebraically as
`color(white)("XXXX")` `2*(+-sqrt(18))`

Since `sqrt(18) = sqrt(3^2*2) = sqrt(3^2)*sqrt(2) = 3sqrt(2)`

`2*(+-sqrt(18)) = +- 6sqrt(2)`