Đáp án:
$3x(x-1)²-(1-x)³$
$=3x(x²-2x+1²)-(1-x)³$
$≡3x²-6x²+3x-(1-x)³$
$=3x²-6x²+3x-(1³-3x+3x²-x³)$
$=3x²-6x²+3x-1³+3x-3x²+x³$
$=4x³-9x²+6x-1$
Chúc bn hc tốt🥰
`\text{#LinhSad}`
Giải thích các bước giải:
3x(x - 1)² - (1 - x)³
= 3x(x² - 2x + 1²) - (1 - x)³
≡ 3x² - 6x² + 3x - (1 - x)³
= 3x² - 6x² + 3x - (1³ - 3x + 3x² - x³)
= 3x² - 6x² + 3x - 1³ + 3x - 3x² + x³
= 4x³ - 9x² + 6x - 1
chúc bạn học tốt Y^Y
Exercise 3: Điền mạo từ thích hợp “a/an/the hoặc x (không cần mạo từ)”” vào chỗ trống. 14. Are John and Mary ________cousins? ~ No, they aren't ________cousins; they are ________brother and ________sister. 15. ________fog was so thick that we couldn't see ________ side of ________road. We followed ________car in front of us and hoped that we were going ________right way. 16. I can't remember ________exact date of ________storm, but I know it was on ________Sunday because everybody was at ________church. On ________Monday ________post didn't come because ________roads were blocked by ________fallen trees. 17. Peter thinks that this is quite ________ cheap restaurant. 18. A: There's ________murder here. ~ B: Where's ________body?~ A: There isn't ________body. ~ B: Then how do you know there's been ________murder? 19. Number ________hundred and two, - ________house next door to us, is for sale. It's quite ________nice house with ________big rooms ________back windows look out on ________park. 20. I don't know what ________price ________owners are asking. But Dry and Rot are ________agents. You could give them ________ring and make them ________offer. 21. ________postman's little boy says that he'd rather be ________dentist than ________doctor, because ________dentists don't get called out at ________night. 22. Just as ________air hostess (there was only one on the plane) was handing me ________cup of ________coffee ________plane gave ________lurch and ________ coffee went all over ________person on ________other side of ________gangway. 23. There was ________collision between ________car and ________cyclist at ________ crossroads near ________my house early in ________morning. 24. Professor Jones, ________man who discovered ________new drug that everyone is talking about, refused to give ________press conference. 25 Peter Piper, ________student in ________ professor's college, asked him why he refused to talk to ________press.
hai đơn vị kinh doanh chia lãi theo tỉ lệ 3:7 biết tổng tiền lãi là 3205000 đồng .Hỏi mỗi đơn vị được chia lãi bao nhiêu? (tỉ lệ thức )
`(2x^2 y)^3 . (x - 4xy^2 + 3x^2 y)`
3. Rewrite the following sentences in direct speech. 1. They wondered what to do to get good marks at the exam. ____________________________________________________________________2. Minh asked his teacher what to prepare for the camping. ____________________________________________________________________3. Nam and Lan couldn't decide what to buy for Linh on her birthday. ____________________________________________________________________4. She was not sure whether to tell her close friend that news. ____________________________________________________________________ 5. He had no idea who to ask for advice about his problem. ____________________________________________________________________ giúp em với ạ, em đang cần gấp :(
giúp mình với, mình đang cần gấp
giải giúy em ạ em cảm ơn em sẽ đánh giá 5sao
Vẽ đậu mầm NT: Có ai giống tui ko cứ mỗi lần kêu đói là bị ăn chửi
mọi người ơi giúp em vs ạ em hứa sẽ vote 5 sao và cám ơn ,ctlhn nữa ạ
1. Yesterday, Hoa and her aunt (go)............ to the market. 2. I would like (tell)............ you about my family. 3. Vegetables often (have)............ dirt from the farm on them.
Giúp tui với ạ mong giúp tuii giúp tui
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