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Автор - rprapraprpraprpraprp

Решите пожалуйста В2 с обеих вариантов

Ответ

Автор - maymr

1)

frac{9}{7+4sqrt{3}}=frac{9(7-4sqrt{3})}{(7+4sqrt{3})(7-4sqrt{3})}=frac{63-36sqrt{3}}{49-48}=frac{63-36sqrt{3}}{1}=63-36sqrt{3}

2)

frac{6}{5-2sqrt{6}}=frac{6(5+2sqrt{6})}{(5-2sqrt{6})(5+2sqrt{6})}=frac{30+12sqrt{6}}{25-24}=frac{30+12sqrt{6}}{1}=30+12sqrt{6}

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