Question

How do you find the exact value of the radical expression in simplest form for `sqrt144 -sqrt40 -sqrt10`?

Answer 1

`sqrt(144) = 12`

`sqrt(40) = 2sqrt(10)`

so
`sqrt(144) -sqrt(40) -sqrt(10)`

`= 12 - 2sqrt(10) - 1sqrt(10)`

`= 12 - 3 sqrt(10)`