Question

I need help please.

Answer 1

13 - 17
`√(11)`

Explanation:

Using the rule

`√(a)` ×
`√(a)` = a

Each term in the second factor is multiplied by each term in the first factor, that is

2
`√(11)` (
`√(11)` - 9 ) + 1 (
`√(11)` - 9 )

Distribute both parenthesis

= (2 × 11) - 18
`√(11)` +
`√(11)` - 9

= 22 - 17
`√(11)` - 9

= 13 - 17
`√(11)`