(x + 2)^2 – (x – 2)^2 как разложить на множители? - Znanija.Site

(x + 2)^2 – (x – 2)^2 как разложить на множители?
- Предмет:
  Алгебра
- Автор:
  cerisecgm9
- 5 лет назад

Ответы 2

${(x + 2)}^{2} - {(x - 2)}^{2} = {x}^{2} + 4 - 4x - {x}^{2} - 4 + 4x \\$
- Автор:
  blake961
- 5 лет назад
- 0
x^2+4x+4-x^2+4x-4 дальше просто скороти додай и всё
- Автор:
  ball
- 5 лет назад
- 0
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Exercise 1.

Open the brackets using Present Simple or Present Continuous.

I (not to drink) coffee now. I (to write) an English exercise.
I (not to drink) coffee in the evening. I (to drink) coffee in the morning.
Your friend (to do) his homework now?
Your friend (to go) to school in the morning?
Look! The baby (to sleep). The baby always (to sleep) after dinner.
My grandmother (not to work). She is on pension.
Where your cousin (to work)? - He (to work) at a hospital.

Exercise 2.

Choose the correct answer.

Story about a person's life written by someone else
a) autobiography

b) historical fiction

c) journal

d) biography

Facts and statistics about people, places and things
a) textbook

b) encyclopedia

c) dictionary

d) biography

Long story, usually in chapters
a) play

b) novel

c) short story

d) newspaper

Has rhythm, may rhyme, may have stanzas (sections)
a) poetry

b) prose

c) short story

d) science fiction

Exercise 3.

Open the brackets using the first verb with used to, and the second one in Past Simple.

e.g.: He ____ (live) in New York before he ____ (enter) Oxford University. – He used to live in New York before he entered Oxford University.

I _____ (earn) enough money, but then I ____ (lose) my job.
Bob ____ (not like) football, but then he ____ (change) his mind.
My mum ____ (drive) a lot before she ____ (have) that accident.
This telephone ____ (work) well before my son ____ (drop) it.
Mary ____ (work) in a hotel, but then she ____ (get) married.
He ____ (play) basketball before he ____ (break) his leg.

Exercise 4.

Choose the correct answer.

He was cooking ______ his wife came into the room.
a) as soon as

b) after

c) when

She stayed at school _______ the lessons were over.
a) as soon as

b) until

c) when

He was reading the book ______ his children were doing homework.
a) as soon as

b) after

c) while

Call me ________ you remember some new information.
a) as soon as

b) after

c) when
- Предмет:
  Английский язык
- Автор:
  welch
- 5 лет назад
- Ответов:
  
  1
- Смотреть
Себестоимость изготовления одной детали — 740 р. Внедрение новой технологии позволило снизить себестоимость детали на 2%.
Какой стала себестоимость детали?
- Предмет:
  Математика
- Автор:
  fabiolaidmx
- 5 лет назад
- Ответов:
  
  1
- Смотреть
0.5(y+3)=0.8(10-y) решите
- Предмет:
  Математика
- Автор:
  sethvsk3
- 5 лет назад
- Ответов:
  
  2
- Смотреть
729 ----->0
824 ----->6
713 ----->5
515 -----> ?
A) 1 B) 2 C) 3
Сделайте и выберите правильный ответ
- Предмет:
  Математика
- Автор:
  mariacooper
- 5 лет назад
- Ответов:
  
  1
- Смотреть

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