Question

I need help please.

Answer 1

Answer:

13 - 17$\sqrt{11}$

Step-by-step explanation:

Using the rule

$\sqrt{a}$ × $\sqrt{a}$ = a

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

2$\sqrt{11}$ ($\sqrt{11}$ - 9 ) + 1 ($\sqrt{11}$ - 9 )

Distribute both parenthesis

= (2 × 11) - 18$\sqrt{11}$ + $\sqrt{11}$ - 9

= 22 - 17$\sqrt{11}$ - 9

= 13 - 17$\sqrt{11}$