Предмет: Алгебра, автор: wwwvovapavlyuk1902

Знайдіть суму і різницю виразів 50 б

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Ответы

Автор ответа: Пеппер

Объяснение:

2a+b + 2a-b = 4a; 2a+b -(2a-b) = 2a+b-2a+b=2b

2a-b + 2a+b = 4a; 2a-b -(2a+b) = 2a-b-2a-b=-2b

Автор ответа: iramazurk

Объяснение:

№1

Сумма:

(2а + в) + (2а - в) = 2а + в + 2а - в =

(2а + 2а) + (в - в) = 4а + 0 = 4а

Разница:

(2а + в) - (2а - в) = 2а + в - 2а + в =

(2а - 2а) + (в + в) = 0 + 2в = 2в

№2

Сумма:

(2а - в) + (2а + в) = 2а - в + 2а + в =

(2а + 2а) + (-в + в) = 4а + 0 = 4а

Разница:

(2а - в) - (2а + в) = 2а - в - 2а - в =

(2а - 2а) + (-в - в) = 0 + (-2в) = -2в

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