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Leviafan [203]
3 years ago
8

I need help please.

Mathematics
1 answer:
IgorLugansk [536]3 years ago
7 0

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}

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