Mong mn giúp vs ah,từ câu 16 xuống ah

CMR các bth sau có giá trị âm với mọi biến C=-5x^2 + 20x - 49 Sao ta không làm kiểu này ạ và mọi người giải thích giúp em với ạ C= - ( 5x^2 - 20x + 49 ) C= - [ 5x^2 -2.5x.2 + 2^2 + 45 ] Mọi người giải thích cho em vs Xong em vote 5 sao Cảm ơn nhiều ạ Giúp em với

A=( √5+ √2+1) ×( √5-1) B=( √2+1+√3) ×( √2+1- √3) C=( √4-( √3)- √4+( √3)) ² helpp me

II. Give the correct form of the verbs in brackets.( 15pts) 1. Ba gets used to ( stay)____________ up late. 2. I lit the fire at 7.00 and it (burn)____________brightly when Jack came in at 8.00. 3. The money (steal)____________in the robbery was never found. 4. At this time next month, they (work)____________in Ho Chi Minh City. 5. She locked the door so as (not disturb)____________. 6. My mother is too tired (cook) ………………………………………. tonight. 7. The boys like (play) ………………………………. games but hate doing the homework. 8. Look at the car. The driver (drive) ……………………………………………. too fast. I think he (hit) ……………………………………………….. the cyclist. 9. I don't enjoy (laugh) ……………………………………………… at by other people. 10. The children (play) ………………………………… when it started to rain. 11. Lan’s hair was dirty. Now it is clean, she (clean)……………………… it. 12. Look! Somebody (break)…………………………….. that door. 13. They (not meet)……………………….. us since last week. 14. What (you/do) ………………………………….. at this time yesterday. 15. Our school (open) …………………………….. a new club next week.

Giúp mình với ạ!! Đề : Viết Đoạn Văn Nghị Luân Văn Học về đoạn 2,3 bài thơ Lượm .

Vẽ Jenny Huỳnh phải thực là sì sến nhé ( có thêm bơ và chuối cho nó oke :)) ) Tradi hay digi đều được nhưng phải đẹp!

Bài 3 (2,0 điểm). Tìm các số nguyên n thoả mãn: a) 9- 2n chia hết cho n +1 b) n² +3 chia hết cho n– 2. GIÚP EM NHANH VỚI Ạ, EM CẢM ƠN

Cho tứ giác ABCD tìm các góc của tứ giác Â: B : C : D = 1: 2: 3: 4

Làm giúp tớ bài văn tả con vật mà em yêu thích nhất Vẫn chỉ cần thân bài nhé :D Cảm ơn các pẹn :()

I. Choose the best answer from the four choices (A or B, C, D) to complete each of the following sentences. (10 pts) 1. Bob hasn’t _________up his mind yet. A. made B. gone C. used to D. found 2. This is the _________book I have ever read. A. bad B. worse C. worst D. badly 3. Would you like me to get you something to drink? ~ _________. A. Thatwouldbenice B. No, I’m sorry C. That’s too bad D. My pleasure 4. I usually go to work by bus, but _________and then I use my motorbike. A. again B. once C. now D. ever 5. Of my parents, my father is _________. A. the stricter B. the strictest C. stricter D. strict 6. "What can I get for you?" ~ “ _________.” A. All right B. I'm afraid not C. I hope so D. Yes, please 7. The coat _________on the floor belongs to my brother. A. lies B. lying C. lain D. is lying 8. Tuan had a bad cut on his arm. It’s _________badly. A. bleeding B. burning C. coughing D. sneezing 9. Your _________is included in the ticket price. A. reservation B. vacation C. accommodation D. money 10. Do you ever talk to _________ A. yourself B. myself C. itself D. herself 11. The computer is _________guarantee so the company should do something with it. A. with B. on C. for D. under 12. She was _________ tired that she wen to bed early. A. such B. too C. as D.so 13. “I think computers are useful.” ~ “ _________.” A. I’m not agree B. So do I C. I disagree too D. So are they 14. Vietnam is a _________country. A. rubber-exported B. exporting-rubber C. exported-rubber D.rubber-exporting 15. He can run very _________ A. fastly B. fast C. quick D. slow