Предмет: Алгебра, автор: Munojothon

Найдите значение выражения плиииз хелп :
x²+1/x²,если x+1/x=5

Ответы

Автор ответа: Evgenia4836

0

возводим в квадрат, получаем:
x²+2*(1/x)*x+1/x²=25
x²+2+1/x²=25
x²+1/x²=23

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