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Автор - saveliivord83

решите СРОЧНО!!! Контрольная осталось 12 минут ​

Ответ

Автор - FilNez

Ответ:

 frac{12}{12 -  5sqrt{6} }  -  frac{12}{12 + 5 sqrt{6} }  =  frac{12(12 + 5 sqrt{6} )}{144 - 25 times 6}  -  frac{12(12 - 5 sqrt{6} }{144 - 25 times 6}  =  frac{12(12 + 5 sqrt{3} )(12 - 5 sqrt{3}) }{144 - 150}  =   frac{12(144 - 150)}{144 - 150}  = 12

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