Предмет: Алгебра, автор: abaka2012

разность двух положительных чисел равна 8. а произведение равно 65 найдите меньшее из чисел.... с решением..

Ответы

Автор ответа: Elbrusiada
0

Пусть одно число будет х,другое у, составим систему:  х-у=8      у=х-8

                                                                                                       ху=65

и решаем её, подставляем во второе уравнение вместо у свою подстановку:

х(х-8)=65

-8х+х^2-65=0

х^2-8х+65=0

D=(-8)^2-4*1*(-65)=64+260=324

х1=(8+18):2=13 х2<0(не подходит по смыслу)

у=13-8=5

Ответ: числа 5 и 13

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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