`(x-1)^2-(y-1)^2`
`=[x-1-(y-1)](x-1+y-1)`
`=(x-1-y+1)(x-1+y-1)`
`=(x-y)(x+y-2).`
`(x-1)^2 - (y-1)^2`
`= x^2 - 2x + 1 - (y^2 - 2y + 1)`
`= x^2 - 2x +1 - y^2 + 2y +1`
`= x^2 + 2(x+y) +2`
Sau đó nếu có giá trị của `x` hay `y` thì bạn chỉ cần thay nó vào thôi nhé .
Vt calli chữ "King" Tradi not digi Pic kí ang ko kí
từ nào là từ hán việt trong các từ sau a Mơn man b Bồng bềnh c Hoài vọng d Réo rắt
II. Choose the correct answer for each of the following sentences. ( 1.5 points) 2. The island in Ha Long Bay is named ..................things around us. A. in B. on C. after D. with 3. Ayres Rock is in ……............................ III. Supply the correct verb form to complete the following sentences (1.0 point) 2. We mustn’t ( pick)....................flowers in the school garden.
mọi người giải hộ em hai bài dưới với ạ em cảm ơn
Vt calli chữ "King of dragons" Tradi not digi Pic kí ang ko kí
Làm giúp mình vs mọi người Cảm ơn
Giải giúp mình bài này với ạ :33
tìm m để đồ thị hàm số y= $\frac{mx-1}{x+2}$ cắt đường thẳng y=2x-1 tại 2 điểm M và N sao cho MN= √10
17. John went to the show but he forgot the wallet. A. compound sentence B. complex sentence C. simple sentence D. compound-complex sentence 18. The basketball player stretched before the game. A. compound sentence B. complex sentence C. simple sentence D. compound-complex sentence 19. The team will play together or the team will lose the game. A. simple sentence B. compound sentence C. complex sentence D. compound-complex sentence 20. The class will be quiet during the test or they will fail.33 A. simple sentence B. compound sentence C. complex sentence D. compound-complex sentence 21. My mother makes me breakfast in the morning. A. compound sentence B. complex sentence C. simple sentence D. compound-complex sentence 22. Some laws are helpful and people don’t know about them. A. simple sentence B. compound sentence C. complex sentence D. compound-complex sentence 23. My family took me out for my birthday. A. complex sentence B. compound-complex sentence C. simple sentence D. compound sentence 24. Our family loves Thai food, and we order it once a week. A. complex sentence B. compound-complex sentence C. simple sentence D. compound sentence 25. Allen is injured, so Will is going goalie tonight. A. simple sentence B. compound sentence C. complex sentence D. compound-complex sentence
Chọn một trong hai từ thích hợp để hoàn thành mỗi câu sau 1. Both men (was/were) interested in this job in the interview yesterday. 2. There are four books on the table. (Each/All) has a different colour. 3. He has two book stores. One is in Thác Mỏ. (The other/Another) is in Phước Bình. 4. (Neither/None) restaurant is expensive. 5. Did you take (any/some) photographs when you were on holiday? 6. The news has (many/plenty of) important information. 7. (Neither/Neither of) the restaurants we went to were expensive. 8. Every seat in the theater last night (was/were) taken. 9. The Olympic games are held (every/many) four years. 10. They went from one shop to (another/other).
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