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Вопрос по алгебре:
Решите, пожалуйста, уравнение с объяснением:
х²-х-6=0-
Автор:
dominick67
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Это квадратное уравнение , которое решается с помощью теоремы, обратной теореме Виета. Корни угадываются. если ее знать.
х₁+х₂=1 сумма корней равна второму коэффициенту, взятому с противоположным знаком
х₁х₂=-6 произведение равно свободному члену с тем же знаком.
Это числа 3 и -2.- корни уравнения
Еще 4 ненужных тебе вопроса, но это важно для поиска
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Вопрос по английскому языку:
1. Раскройте скобки, употребляя глаголы в present simple or past simple, active or passive.
1. It's a big factory. Five hundred people are employed (employ) there.
2. Water ___________ (cover) most of the Earth's surface.
3. Most of the Earth's surface ___________ (cover) by water.
4. The park gates ___________ (lock) at 6.30 p.m. every evening.
5. The letter __________ (post) a week ago and it ____________ (arrive) yesterday.
6. The boat ________ (sink) quickly but fortunately everybody ________________ (rescue).
7. Jacob's parents _____________ (die) when he was very young. He and his sister _________ (bring) up by their grandparents.
8. I was born in London but I __________ (grow) up in the north of England.
9. While I was on holiday, my camera ________ (steal) from my hotel room.
10. While I was on holiday, my camera _________ (disappear) from my hotel room.
11. Why ___________ (Emily / resign) from her job? Didn't she?
12. Why ______________ (Joshua / sack) from his job? What did he do wrong?
13. The company is not independent. It ________________ (own) by a much larger company.
14. I saw an accident last night. Somebody __________ (call) an ambulance but nobody ___________ (injure) so the ambulance _____________ (not / need).
15. Where _________ (these) photographs / take)? In London? _____________ (you / take) them?-
Ответов: 1
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6 лет назад
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Вопрос по английскому языку:
2. Раскройте скобки, употребляя глаголы в Passive Voice.
1. I am sure I (to ask) at the lesson tomorrow.
2. They told me that the new student (to speak) much about.
3. The hostess said that one more guest (to expect).
4. The newspaper said that an interesting exhibition (to open) in the Hermitage the next week.
5. This new dictionary (to sell) everywhere now.
6. All the texts (to look) through yesterday and not a single mistake (to find).
7. Two reports on Hemingway's stories (to make) in our group last month. Both of them were very interesting.
8. He said that Grandmother's letter (to receive) the day before.
9. Two new engineers just (to introduce) to the head of the department.
10. Don't worry, everything will be all right: the children (to take) to the theatre by the teacher and they (to bring) back to school in the evening.-
Ответов: 1
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6 лет назад
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Вопрос по математике:
Укажите верное равенство
а)230×10=230×100
б) 320 / 8 = 5 x 6
в) 80 / (5×4)=120/30
г)96/16=8-
Ответов: 2
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6 лет назад
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Вопрос по математике:
Для дачи Купили 3 рулонов пленки по 20 м в каждом рулоне. Хватит ли этой плёнки для двух теплиц Ну, если на каждую теплицы идёт 28 м плёнки? Если пленки хватит, то сколько метров пленки ещё останется?
Помогите пожалуйста и одна просьба тем кто будет писать после уже готового ответа не удаляйте ответы те которые были написано до вас! Спасибо заранее!-
Ответов: 3
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6 лет назад
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