Question

How do you FOIL `(√5 + √2) (√5 - √2)`?

Answer 1

`5-2=3`

Explanation:

`(sqrt(5)+sqrt(2))(sqrt(5)-sqrt(2))=`
`=(sqrt(5)sqrt(5))cancel(-(sqrt(5)sqrt(2)))+cancel((sqrt(2)sqrt(5)))-(sqrt(2)sqrt(2))=`
`=5-2=3`