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dinter20
@dinter20
July 2022
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oppression
Решение:
√25+4√21=(2²+2·2√21+(√21)²)=(2+√21)²
70-14√21=(7²-7·√21+(√21)²)=(7-√21)²
√(2+√21)²+√(7-√21)²=2+√21+7-√21=9
Ответ: 9.
2 votes
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Answers & Comments
√25+4√21=(2²+2·2√21+(√21)²)=(2+√21)²
70-14√21=(7²-7·√21+(√21)²)=(7-√21)²
√(2+√21)²+√(7-√21)²=2+√21+7-√21=9
Ответ: 9.