Предмет: Алгебра, автор: gfdrtvv

подайте у вигляді добутку (3а-5)²-(5а-7)² ПОЖАЛУЙСТА СРОЧНО!!!!!​

Ответы

Автор ответа: nessahossler691
0

(3а-5)²-(5а-7)²=9а²-30а+25-(25а²-70а+49)=9а²-30а+25-25а²+70а-49=-16а²+40а-24

использовала: (а-б)²=а²-2аб+б²

Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Английский язык, автор: fedotova2604

Упр. 228. Раскройте скобки, употребляя глаголы в одном из следующих времен: Present, Past, Future Simple; Present, Past Continuous; Present, Past Perfect.

1. What you (to learn) for today? — I (to be) sorry, I (not to prepare) my lesson. I (to be) ill yesterday and (not to know) what to do. I (to prepare) my lesson tomorrow. — If you (not to prepare) your lesson tomorrow, you (to get) a bad mark. 2. What you (to do) at five o'clock yesterday? 3. Mike always (to do) his homework in the evening, but today he (to begin) doing it as soon as he comes from school, because his father (to promise) to take him to the theatre. 4. When Mary (to come) home, her brother (to read) the book which she (to bring) him two days before. 5. Autumn (to come). It (to be) November now. It (to get) colder, the days (to get) shorter. It often (to rain). Soon it (to be) very cold. 6. When I (to do) my homework yesterday, I quickly (to run) to the yard, because my friends (to wait) for me there. 7. We (to have) a good time last summer.
1 год назад
Предмет: Английский язык, автор: андрейка2233
Ааааааа как же лучше объяснить?!Вобщем нужно написать по английски следущее:
1.это я Гриша мне 11 лет.
2.мой папа Андрей 37 лет.
3.мама Наташа 38 лет.
4.это папина мама и моя бабушка
Зоя.70 лет.
5.а это мамина мама и моя бабушка Томара.60 лет.
6.это двоюродная сестра Аврора.12 лет.
ПОМОГИТЕ ПОЖАЛУЙСТА РЕБЯТА,желательно знающие а не новички☺1).Написать это на английском и еще не мало важное:-2).всё это же русскими буквами с английским произношением.
Буду очень признателен всем откликнувшимся.СПАСИБО
1 год назад
Предмет: Қазақ тiлi, автор: Аноним
Интернет зияны туралы шыгарма
1 год назад
Предмет: Биология, автор: veronika22873
что унражает росту численности тровеных лягушек?
7 лет назад
Предмет: Английский язык, автор: Cat973
Даю 90 Баллов Срочно!!!!! Всего 3 задания


Ex. 2 Поставьте предложения в вопросительную и отрицательную формы.

1. My sister is playing the piano now. 2. The teacher is explaining the rule. 3. We are learning the new words. 4. Ann is standing at the window. 5. We are going to the park.. 6. John is taking a piece of chalk and writing a sentence on the blackboard. 7. I am doing my homework. 8. Jane is speaking on the telephone. 9. She is cooking supper.


Ex. 3 Раскройте скобки, употребляя глаголы в Present Simple или Present Progressive

1.The man who (to speak) with my mother (to be) our neighbor who (to live) across the street. 2. It (to be) a very interesting scientific film. In it you can see how the plants (to grow) right before your eyes. 3. Where you (to hurry)? — I (to hurry) to the railway station. My sister (to come) from Moscow. 4. You (to hear) the speaker well? — Yes, I (to hear) him clearly. I (to listen to) very attentively, but still I (not to understand) the main point of his speech. 5. Don't come into this room. Father (to work) there now. 6. Where are you going this Sunday? — This Sunday I (to go) to the country, but usually on Sundays I (to stay) at home.


Ex. 4 Раскройте скобки, употребляя глаголы в Future Progressive.


1. Не (not to wait) for us at 6 o'clock tomorrow. 2.I (to translate) this article, when my mother come. 3. The conference (to take place) from 2 till 6 o'clock on Monday. 4. How long you (to stay) at your parents?
7 лет назад