Question

How do you write `sqrt(405)` in simplified radical form?

Answer 1

`9sqrt(5)`

Explanation:

Factoring:
`405`
`color(white)("XXX")=5xx81`
`color(white)("XXX")=5xx9^2`

`rArr sqrt(405) = sqrt(5)*sqrt(9^2) = 9sqrt(5)`