Предмет: Математика, автор: nkusnir28

1)3х³-х²-6х +2
якщо х=⅔​

Ответы

Автор ответа: Slava491
1

1)

3х³-х²-6х+2=х²(3х-1)-2(3х-1)=(3х-1)(х²-2)=

при х= 2/3

=(3•2/3-1)((2/3)²-2)=(2-1)(4/9-2)=1•(-1 5/9)= -1 5/9

Ответ: -1 5/9

Автор ответа: iramazurk
1

Ответ:

-1 5/9

Пошаговое объяснение:

х = 2/3

3х³ - х² - 6х + 2 = 3 * (2/3)³ - (2/3)² - 6 * 2/3 + 2 =

3 * 8/27 - 4/9 - 12/3 + 2 = 24/27 - 4/9 - 4 + 2 =

8/9 - 4/9 - 2 = 4/9 - 2 = 4/9 - 1 9/9 = -1 5/9

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