Предмет: Математика, автор: babukhinarita

(y+7)^2-2(y+10)(y+4) по действиям

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Автор ответа: ekaterina1998u

Пожалуйста, не забудьте оценить!

Приложения:

babukhinarita: Спасибо

babukhinarita: Но мне надо прям по действиям
1)
2) итд

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Read and translate the text.

DIFFERENT TYPES OF TELEPHONE SYSTEMS.

The word telephone comes from the Greek words tele, meaning “far,” and phone, meaning "sound," and refers to a telecommunications device that allows the human voice to travel across great distances. There are different types of telephones and corresponding types of telephone systems. The three main types of telephone systems are Plain Old Telephone Service, cellular wireless phones, and Internet
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