Предмет: Математика, автор: Alwaezi

7. Спростіть вираз -2 (4n+1)+3 (2n-1) та знайдіть значення виразу при п=2

Ответы

Автор ответа: saharokytt
3

Ответ:

= -9

Пошаговое объяснение:

Давайте спростимо вираз:

-2(4n + 1) + 3(2n - 1)

Спочатку застосуємо розподільний закон множення:

= -8n - 2 + 6n - 3

Тепер згрупуємо подібні члени:

= (-8n + 6n) + (-2 - 3)

= -2n - 5

Тепер знайдемо значення виразу при p = 2, підставивши це значення вмісці n:

-2(4(2) + 1) + 3(2(2) - 1)

= -2(8 + 1) + 3(4 - 1)

= -2(9) + 3(3)

= -18 + 9

= -9

Таким чином, значення виразу при n = 2 дорівнює -9.

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A) in New York
B) in England
C) in Philadelphia
D) in Paris
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A) she was a woman
B) she wrote too many letters
C) she couldn’t graduate from medical school
D) she couldn’t open her hospital