Đáp án:
\(\left[ \begin{array}{l}x=5\\x=3\end{array} \right.\)
Giải thích các bước giải:
(x-3).(x+4)=(x-3).(2x-1)
⇔ x²+4x-3x-12=2x²-x-6x+3
⇔ x²-2x²+4x-3x+x+6x-12-3=0
⇔ -x²+8x-15=0
⇔ \(\left[ \begin{array}{l}x=5\\x=3\end{array} \right.\)
Cho tam giác có góc A tù , I là một điểm bất kì trên AC . Chứng minh ∠BIC là góc tù
III. Complete the sentences with the passive form of the verbs in brackets. 1. Tsunamis_________ (typically/ cause) by large, undersea earthquakes. 2. Nearly a quarter of all homes in the Keys_________ (destroy) by Hurricane Irma in 2017. 3. Over the past two years, 500,000 damaged homes_________ (rebuild) with support from the government and donors. 4. An earthquake warning System_________ (install) on the West Coast next month. 5. An average of 10 people in Florida_________ (kill) by lightning strikes annually. 6. Indonesia_________ (strike) by a tsunami a few days ago. 7. An estimated 10,000 people_________ (already/ evacuate) due to the wildfires since Wednesday. 8. Scientists predict the South coast_________ (hit) by a large hurricane in two days. 9. After the storm, some major roads are closing because they_________ (repair). 10. The name Heather_________ (use) for three tropical cyclones up to now. IV. Put these sentences into the passive form. 1. Mary types letters in the office. .................................................................................................................................... 2. His father will help you tomorrow. .................................................................................................................................... 3. Science and technology have completely changed human life. .................................................................................................................................... 4. Peter broke this bottle. .................................................................................................................................... 5. They are learning English in the room. .................................................................................................................................... 6. Nothing can change my mind .................................................................................................................................... 7. No one had told me about it. .................................................................................................................................... 8. I don’t know her telephone number. .................................................................................................................................... 9. My students will bring the children home. .................................................................................................................................... 10. They sent me a present last week. ...................................................................................................................................
Em hãy nêu quan điểm của mình về nhận định: “trong giai đoạn đầu thì HCM xem con đường CNXH là phương tiện để đạt được mục đích giải phóng dân tộc”? đúng, sai, giải thích?
giúp mik bài 5 đó vói nhớ trả lời đầy giúp mik vói nha
Sự tinh nhạy của nhà văn Đoàn Giỏi trong văn bản “Sông nước Cà Mau”dc thể hiện như thế nào trong việc miêu tả chợ Năm Căn
đặt nhân vật anh thanh niên vào hoàn cảnh cụ thể để tự bộc lộ tính cách và phẩm chất của mình trong Lặng lẽ sa pa của Nguyễn Thành Long. Em hãy chứng minh điều đó
(x^2 - 2X+1)^2 giúp mk vs ạ mk đang cần gấp vote 5 * ạ
Cho tam giác ABC. Giả sử rằng 3góc A+2góc B=180độ. Chứng minh rằng AB^2=BC^2+AB.AC
Tính nhanh 126+(-20)+|124|-(-320)-|-150|
Exercise 6: Read the text and answer the questions. The Temple of Literature was built in 1070 during the reign of King Ly Thanh Tong to worship Confucius. This is also the first national university of Vietnam, a Confucian academy, first for the princes and mandarin only, but later distinction students of ordinary families also being accepted. This place also honored 82 doctorates who had passed through a number of exams in feudal ages. Their names, birthdays and birthplaces are carved in 82 stelaes on the back of tortoises. It is well believed that touching the heads of these tortoises will bring luck. Temple of Literature is a historical complex, consisting of five main courtyards. The best feature of the site is the lawns, gardens and lotus ponds. There are 3 gates at the entrance, the main gate was used by the King, the other two smaller ones used by mandarins, candidates and lower ranking people. This shows respect for the King and humility and patience other side. This is a must see in Hanoi. Opening hours are from 8 a.m. to 5 p.m. daily. Ticket price is 20,000 for normal people and 10,000 for students. 1. Who does Temple of Literature worship? 2. Who can study in Temple of literature first? 3. Could students from normal family study in Temple of Literature? 4. How many doctorates were honored here? 5. What are carved in the stelaes? 6. What is believed to be brought by touching heads of the tortoises? 7. What is the best feature? 8. Who is the main gate used by? 9. Who are the smaller gates used by? 10. How much is a ticket for normal people?
Loga.vn - Cộng Đồng Luyện Thi Trực Tuyến