Giải pt sau $cos4x + 2cos^{2}x + 1 = 0$

So sánh các số sau , số nào lớn hơn :))

Một quả trứng gà có giá 2000 đồng . 10 quả như thế có giá bao nhiêu ?

Mọi người giúp mình trả lời câu hỏi trên ảnh nhá

Tìm các giá trị của ` m ` để phương trình ` ( 1 ) ` có nghiệm ` x_1 ; x_2 ` ` x^2 - ( m + 5 ) x - m + 6 = 0 ` ( 1 )

Giúp mk với ạ,mk sắp nộp bài rồi

Hiups mk với ạ,mk sắp nộp bài rôi

giúp mik nhanh nhé ko copy đâu nha

dì Ba mua 30 quả trứng vịt giá 3.000 đồng một quyển thì vừa hết số tiền đang có cũng với số tiền nếu mua trung ga voi gia 2500 dong mot qua thi mua bao nhieu qua trung ga

Exercise 1: Choose the best answer. Jane is not_____________ her brother. As/so adj/adv as more intelligent as B. intelligent as so intelligent as D. so intelligent that 2. _________you study for these exams, ___________you will do. the harder/the better B. the more/the much the hardest/ the best D. the more hard/ the more good 3. My neighbor is driving me mad! It seems that _______it is at night,_________he plays his music. the less/the more loud B. the less/less the more late/the more loudier D. the later/the louder 4. Thanks to the progress of science and technology, our lives have become_________ adj/adv_er and adj more and more good B. better and better the more and more good D. gooder and gooder 5. Peter is ___________ John. younger and more intelligent than B. more young and intelligent than more intelligent and younger than D. the more intelligent and younger 6. It gets_____________when the winter is coming. cold and cold B. the coldest and coldest colder and colder D. more and more cold 7. The faster we finish, ______________ the sooner we can leave B. we can leave sooner and sooner the sooner can we leave D. we can leave the sooner 8. Of all athletes, Alex is____________ the less qualified B. the less and less qualified the more and more qualified D. the least qualified 9. The faster Thank walks, _______________ more tired B. the more tired he gets C. he gets tired D. he gets more tired 10. The larger the city, ___________ the crime rate. highest B. higher C. the highest D. the higher 11. You must explain your problems___________ as clear as you can B. as clearly as you can as clear than you are D. as clearly as you are. 12. Pil is____________person we know. the happier B. the happiest C. happier D. happiest 13. Which woman are you going to vote for? - I’m not sure. Everyone says that Joan is____one. Smarter B. the smarter C. more smarter D. more smart 14. Bill is_____________ lazier and lazier B. more and more lazy C. lazier and more lazy D. more lazy and lazier 15. It’s too noisy here. Can we go somewhere______________? noisier B. more quiet C. more noisy D. quieter 16. ___________the time passes,_______________I feel. the faster/the nervous B. the more fast/ the nervous the fast/ the more nervous D. the faster/ the more nervous 17. China is the country with ____________population. The larger B. the more large C. the largest D. most large 18. His house is _____________ hers. Twice as big as B. as twice big as C. as two times big as D. as big as twice 19. Vietnam becomes_____________to foreign tourists. Most and most attractive B. the more attractive Much and more attractive D. more and more attractive 20. Can Tho is ____________ from Saigon than Bien Hoa is. Farther B. further C. far D. farer Lm hộ và giải thích cho mik nha