Question

How do you simplify `3sqrt18`?

Answer 1

`9sqrt(2)`

Explanation:

Every positive integer can be expressed as a product of prime numbers. This can be helpful when simplifying roots of integers.

Notice that: `18 = 2*3^2`

Therefore `3sqrt(18) = 3sqrt(2*3^2) = 3*3sqrt(2)`
`= 9sqrt(2)`