Предмет: Алгебра, автор: Аноним

(7a²y³-⅕ay²)(7a²y³+⅕ay²)
пж прошу помогите​

Ответы

Автор ответа: Papapeve
1

Ответ:

Можно "Лучший ответ" если не сложно?

Объяснение:

49a⁴y⁶ - 1/25a²y⁴ = a²y⁴(49a²y²-1/25)

Автор ответа: Universalka
1

Воспользуемся формулой разности квадратов :

(a - b)(a + b) = a² - b²

\displaystyle\bf\\\Big(7a^{2} y^{3} -\frac{1}{5} ay^{2} \Big)\Big(7a^{2} y^{3} +\frac{1}{5} ay^{2} \Big)=\Big(7a^{2} y^{3}\Big)^{2} -\Big(\frac{1}{5} ay^{2} \Big)^{2} =\\\\\\=49a^{4} y^{6} -\frac{1}{25}a^{2} y^{4}

Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Українська література, автор: sophia3004
есе на тему "Життя без дружби неповноцінне" за твором "Шпага Славка Беркути"

Дуже терміново, дам 100 балів.
1 год назад
Предмет: Математика, автор: komokruslan06
4x²+5x-2=0 дайте решение пожалуйста
1 год назад
Предмет: Английский язык, автор: ggggggggggggggfgf073
Проверочная работа по теме «Кем ты собираешься стать?»
1. Reading
Here is a story from the book "Charlie and the Chocolate Factory" by R. Dahl. Прочитайте рассказ и определите, верны или неверны утверждения.
Mr. Bucket.
Mr Bucket was the only person in the family with a job. He worked in a toothpaste factory, where he sat all day long at a bench and screwed the little caps on to the tops of the tubes of toothpaste after the tubes had been filled. But a toothpaste cap-screwer is never paid very much money, and poor Mr Bucket, however hard he worked, and however fast he screwed on the caps, was never able to make enough to buy one half of the things that so large a family needed. There wasn't even enough money to buy proper food for them all. The only meals they could afford were bread and margarine for breakfast, boiled potatoes and cabbage for lunch, and cabbage soup for supper. Sundays were a bit better.
1. Mr Bucket had a job. ___
2. Mr Bucket was a toothpaste cap-screwer. ___
3. Mr Bucket was making a lot of money. ___
4. Mr Bucket had a small family. ___
5. Mr Bucket had enough money to buy much food.___

2. Vocabulary
1) Соотнесите:
1. journalist a. someone whose job is to give advice to people about the law and speak for them in court
2. builder b. a person whose job is to design new buildings and make certain that they are built correctly
3. lawyer c. a person who works in a library
4. architect d. someone who prepares food
5. cook e. a person who writes articles for a newspaper or
magazine or broadcasts them on radio or TV
6. librarian f. a person whose job it is to make buildings
7. salesperson g. an artist who uses paint to create pictures, or a worker
whose job is to cover parts of buildings with paint
8. pilot h. someone who works in an office, writing letters, making phone calls, and arranging meetings
9. painter i. a person whose job is selling things in a shop or
directly to customers
10. secretary j. a person who flies an aircraft
2) Решите кроссворд:
1. This person helps people with health problems.
2. This person works in a school.
3. This person helps to grow the food we eat.
4. This person cleans and fixes the teeth.
5. This person takes care of animals when they are sick or hurt.
6. This person works in a hospital or a doctor's office.

1. c
2. a
3. r
4. e
5. e
6. r
3. Grammar
Выберите правильный ответ:
1. You mustn't / don't have to use the mobile phone on the plane. It's dangerous.
2. You look tired. You should / shouldn't go to bed.
3. Sasha could /couldn't swim a year ago, but now he can.
4. We don't have to / have to wear a uniform, so I normally wear sports clothes.
5. You mustn’t / needn’t take an umbrella today. The sun is shining.
1 год назад
Предмет: Русский язык, автор: nikofest
Выберите предложение, в котором есть дополнение.
A) Вечером улицы были пустыми и тихими.
B) Мы тепло расстались с гостями.
C) Мальчик пел очень красиво.
D) Выстрелы звучали громче и громче
6 лет назад
Предмет: Литература, автор: gradinari87victoria
Срочно пожалуйста..........
6 лет назад