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Musya8 [376]
4 years ago
7

10..................................

Mathematics
2 answers:
Crazy boy [7]4 years ago
3 0

Answer:

The answer is 7 ⇒ answer (C)

Step-by-step explanation:

∵ (3 + √2)(3 - √2) =

  9 - 3√2 + 3√2 - 2 = 9 - 2 = 7

∴ The answer is 7

Nuetrik [128]4 years ago
3 0

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

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