Предмет: Алгебра, автор: vladvalen92gmailcom

решите уравнение х2-х-2=0

CRAZYGANGSTER: ну незнаю

Ответы

Автор ответа: CRAZYGANGSTER

0

Ответ:

Х^2 - Х - 2 = 0

D = 1 + 8 = 9 = 3^2

X1 = ( 1 + 3 ) : 2 = 2

X2 = ( 1 - 3 ) : 2 = - 1

Ответ 2 ; - 1

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