F(X)=x^2-2x^4-5+2x^2-x^4+3+x G(X)=-4+X^3-2X^4-X^2+2-X^2+X^4-3X^3 a. thu gọn và sắp sếp theo thứ tự giảm dần của biến b. Tính H(X)=f(X)-G(X) và K(X)=F(X)-H(X)

Các bạn giúp mik nhé bài 1 hoặc 2 cũng được , thank

Giải giúp mik với cảm ơn rất nhiều !

hiện tượng khí tượng có diễn ra theo quy luật ko

tim x : 10 + 11 + 12 + 13 + ... + x = 5106

giải thích chi tiết giúp mik nha

Câu 6: (1 điểm) Trong mành đất hình chữ nhật có đo dài các cạnh là x (cm) và y (cm), người ta đào một cái giếng hình tròn có bán kính là r (cm). Tính diện tích S còn lại của mảnh đất theo x, y và r. Diện tích S có phải là một đa thức không? (biết hình tròn có bán kinh R thì diện tích S= πR²) GIúp mik câu này vs mọi người

Cho đa thức P = -4x² + 7xy – 3y² + 1 và Q = 5x2 – 7xy+ 4y² -1 al Tính P + Q b/ Chứng minh rằng không có giá trị nào của x, y để 2 đa thức có cùng giá trị âm helpppppppppppppppppppppp em cần gấp lắm luôn ạ

Hôdydotdysotsodoyddyey9xhcmhc hb nfhx

III. Complete the text with the correct form of the verbs in the list. This is my favourite singer. He (1) a famous rock star. He (2) in America. He (3) all around the world and (4) in rock concerts. He (5) his songs and(6) his own video dips. In his free time, he (7) staying at home listening to his CDs. At weekends, he usually (8) to expensive restaurants with his friends. He also (9) a lot of books about strange things. I can’t wait to see him perform live. I (10) him so much. D II. There is one mistake in each sentence. Underline and correct the mistake. Sentences Correction 1. Nam is my classmates. He watches TV every night. 2. I think collecting stamps are interesting. 3. My dad cooks very good. He loves preparing meals for our family. 4. I enjoy to ride my bike to school. 5. We usually go in a small lake out of the city at weekends. 6. Do you still play football next year? 7. We like doing fishing because it is relaxing. 8. Do you think bird-watching interesting? 9. I think playing volleyball interest because it is a team game 10. In my opinion, more people played monopoly in the future. ___________ ___________ ___________ ___________ ___________ ___________ ___________ ___________ ___________ ___________ ❻. READING I. Read the text and choose the correct answer. If you enjoy cycling for pleasure, doing it in London can be a shock. There are not enough lanes especially for bikes, and making your way through the traffic can be very risky. But if you have great passion, cycling in London can be exciting, and it is an inexpensive way of keeping fit if you live there. Some cyclists don’t mind spending a lot of money on expensive bikes. However, if you just want a basic bike that is only for occasional use, there are many cheap choices. Several markets have cheap bikes on sale which may not be impressive to look at but should be satisfactory. You should buy a cycling helmet if you want to cycle in London. Wearing a cycling helmet is not compulsory in Britain, but it is a good idea to wear one for protection. 1. What is the main idea of the passage? A. Cycling helmets B. Cheap bicycles C. Bicycle markets D. Cycling in London 2. According to the passage, cycling in London is A. easy B. difficult C. tiring D. boring 3. The word “it” in line 3 refers to A. cycling B. passion C. excitement D. doing exercise 4. The difficulty of cycling in London is described in lines A. 2 B. 5 C. 5-6 D. 8-9 5. According to the passage, all the followings are true EXCEPT that A. It is compulsory to wear a helmet when cycling in Britain. B. Some bikes in London are cheap. C. There are not many lanes especially for bikes. D. Some cyclists don’t want to buy expensive bikes.