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4 votes
10..................................

10..................................-example-1

2 Answers

5 votes

For this case we must simplify the following expression:


(3+ \sqrt {2}) (3- \sqrt {2})

We apply distributive property:


9-3 \sqrt {2} +3 \sqrt {2} - \sqrt {2} * \sqrt {2} =

We take into account that different signs are subtracted and the sign of the major is placed:


9 - (\sqrt {2}) ^ 2 =\\9-2 =

We take into account that different signs are subtracted and the sign of the major is placed:


9-2=7

So, we have:


(3+ \sqrt {2}) (3- \sqrt {2}) = 7

Answer:

Option C

User Orsiris De Jong
by
9.0k points
3 votes

Answer:

The answer is 7 ⇒ answer (C)

Explanation:

∵ (3 + √2)(3 - √2) =

9 - 3√2 + 3√2 - 2 = 9 - 2 = 7

∴ The answer is 7

User Rahulnikhare
by
8.2k points

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