Предмет: Алгебра, автор: yakrasotka2005

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Автор ответа: 666jaqz999
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Задание 1:

а) -3x²+8x-21

b) ab - 49a = a( b - 49 )

Задание 2:

a) -2x^4+20

b) 27a-30

c) 3a+45

Задание 3:

6x - 5 => 9 - 5 = 4

Задание 4:

15n + 12;

1.1  число 15 делится на 3;

1.2 число 12 делится на 3;

=> какое бы натуральное n я не взял, сумма цифр будет делится на 3, а значит и все число делится на 3

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