tìm nghiệm của M(x) biết M(x)=-3x-2x ²+2-3x ³

1cho x^3-x=8. Tính giá trị của bth:A=x^6-2x^4-x+x^2+x^3 2cho x+y=9 và xy=14. Không tính giá trị của x,y Hãy tính: x^2+y^2;x^2-y^2;x^3-y^3;x^4+y^4;x^5+y^5

1) Cho tam giác nhọn ABC, đường cao AD,BE,CF cắt nhau tại H. Chứng minh a) tam giác HBF đồng dạng với tam giác HCE b) HB.HE=HF.HC=HA.HD c) EH là tia phân giác của góc DEF Mn giúp em với đi ạ. Em cảm ơn

Nêu Cuộc đời, sự nghiệp, phong cách của tác giả TT trong Văn bản "Tôi đi học"

I- Give the correct form of the verbs in brackets in passive voice 1. This cake ______ by Jane now. ( make) 2. My phone _____ by my mother yesterday. ( buy) 3. The ring _____ of diamond . ( make) 4. The milk already ____ by one of my cats ( drink) 5. Your car ____ next to hers last night . ( park) 6. This hole ____ by a mouse for 2 days. ( dig) 7. Tim ____ to school by his father everyday. ( take) 8. They ____ to the prom tomorrow . ( invite) 9. He ____ as an assistant last year. ( engage) 10. The chores always ____ by my mother. (do) 11. All the exam paper are ____ by my teacher next week . ( mark) 12. I ___ to be the winner for the next competitor . ( not, expect) 13. The cat ____ by jane everyday. ( feed) 14. My little baby ____ by my grandmother when she was 5. ( look after) 15. That car ___ by me now. ( drive)

Đổi 3 giờ 45 phút =............................

(1đ) Kết quả khi rút gọn 8.5- 8.2 16  là:

I. Choose the word whose main stress is placed differently from the others. 1. a. damage b. revive c. promise d. bandage 2. a. asleep b. conscious c. sterile d. tissue 3. a. stretcher b. towel c. awake d. treatment 4. a. ambulance b. injection c. minimize d. handkerchief 5. a. happen b. beautiful c. hospital d. overheat II. Choose the word or phrase that best completes each unfinished sentence below or substitutes for the underlined word or phrase. 6. They moved to the city_____well - paying jobs. a. in order to get b. for getting c. in order not to get d. so that getting 7. ____is a type of bed used for carrying the sick or injured people. a. Stretcher b. Ambulance c. Bandage d. Crutch 8. I think I____ home across the park. a. walk b. will walk c. am walking d. walking 9. She_____ tight to the handrail. a. held b. caught c. kept d. touched 10. I forgot to thank them_____ helping me. a. about b. for c. of d. on 11. She covered her knees______ a blanket. a. in b. under c. with d. of 12. The farmers look for other work_____ get more money for their family. a. so as to b. in order that c. so as not to d. so that 13. She was _____ for days after the accident. a. conscious b. unconscious c. consciously d. unconsciously 14. Scale is an instrument for showing_____people or things are. a. how heavy b. how tall c how old d. how high 15. I tried to cheer him_____, but he just kept staring out the window. a. on . b. up c. off d. out

Giúp mình với mình đang làm olm

Tìm phân số có mẫu bằng 5 ,lớn hơn -5/9, nhỏ hơn -2/9