Предмет: Алгебра, автор: gutamurr

Помогите пожалуйста:

Нужно помножить
1) 3x (x²+1)
2) (3-y)(y-5)
3) (a-b)(a-3+b)

Ответы

Автор ответа: Dashulya1337
1

3х(х²+1) = 3х³+3х

2) (3-y)(y-5) = 3y-15у²+5у = 8у-15у²

3) (a-b)(a-3+b) = а²-3а+ab-ba+3b-b² = a²-3a+3b-b²

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