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smokycat666
@smokycat666
July 2022
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Найдите значение выражения a^2-2√(5a) +1
при a=√(5)+4
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BobUnicorn
A²
- 2√(5a) +1
Если а =
√(5)+4, тогда
(√(5)+4)² - 2√(5(√(5)+4)) + 1 = 5 + 8√5 + 16 - 2√25 + 1 = 12 + 8
√5
Ответ: 12 + 8
√5
5 votes
Thanks 5
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Answers & Comments
Если а = √(5)+4, тогда
(√(5)+4)² - 2√(5(√(5)+4)) + 1 = 5 + 8√5 + 16 - 2√25 + 1 = 12 + 8√5
Ответ: 12 + 8√5