1) (4x-1)(x-3) = (x-3)(5x+2) 2) (x+3)(x-5)+(x+3)(3x-4)=0 3) (x+6)(3x-1) + x+6=0 4) (x+4)(5x+9) –x - 4= 0 5) (1 –x )(5x+3) = (3x -7)(x-1) 6) 2x(2x-3) = (3 – 2x)(2-5x)

Bỏ ngoặc rồi tính 1) -7264+(1543+7264) 2) (144-97)-144 3) (-145)-(18-145) 4) 111+(-11+27) 5) (27+514)-(486-73) 6) (36+79)+(145-79-36) 7) 10-[12-(-9-1)] 8) (38-29+43)-(43+38) 9) 271-[(-43)+271-(-17)] 10) -144-[29-(+144)-(+144)] GIÚP MÌNH VỚI MN ƠI MÌNH SẼ BÌNH CHỌN CÂU TRẢ LỜI HAY NHẤT CHO CÁC BẠN NHA

Tính nhanh : -125 . (23-2)+125.23

Giúp em giải phương trình sau với ạ. 3 ý nhỏ thôi ạ

Cho đa thức bậc hai f(x)=ax^2+bx=c Biết rằng f(0)=2018 ; f(1)=2019 ; f(-1)=2017 Tính f(-2019)

viết 1đoạn văn miêu tả khoảng 5-7 câu nội dung tự chọn trong đó có sử dụng 2 kiểu so sánh . Chỉ rõ các kiểu so sánh.

Cho tam giác ABC có số đo các góc là số tự nhiên và lớn hơn 58 độ. Tính số đo các góc của tam giác ABC

Giúp mình bài này với I. Put each verb in bracket into a suitable tense 1. If I (know)…………………. that you were ill, I (go)…………………… to see you. 2. If she'd had enough money, She (buy) ………………………… a car. 3. I (buy) …………………….. a car If you lend me some money. 4. I (see) ……………………… him if I (go) …………………. to the party last night. 5. We could have gone out if the weather (not be)…………………………… so bad. 6. If the book (not be )…………………… expensive, I'll buy it. 7. You would be very surprised if he (return)……………………………… 8. I'll go out if it (not rain)………………………………. 9. They wouldn't come to the party if you (not invite) …………………………..them 10. What ………………… you (do) ………. if you (be) ………………….. him? 11. If that hat costs much, I (buy) …………………………. a small one. 12. If you (drive) ………...more carefully, you (not have) …………… so many accidents. 13. If I (make) ………. that mistake again, my teacher (get) …………… angry with me. 14. If I spoke English, my job (be) ………………………….. a lot easier. 15. If he (go) …………… to London yesterday, he ( meet) ……………. his old friend. 16. I will lend them some money if they (ask) ………………………….. me. 17. If we had known who he was, we (invite) …………….. him to speak at our meeting. 18. My dog (bark) ………………..… if it (hear) ………………….. any strange sound. 19. If I (have) …………………….. enough money, I would buy a house. 20. They (not/let) ………………………… you in if you (come) late. 21. If you (not go) ……………….. away, I (send) …………………… for a policeman. 22. If I (be) ………… in your place, I (accept) …………… Mr. Anderson’s invitation. 23. If I (win) ………………………. a big prize in a lottery, I’d give up my job. 24. If I (be) …………………….. you, I (tell) ……………………… the truth. 25. I was busy. If I (have) …………..free time. I (go) …… …. to the cinema with you.

trình bày phương pháp hóa học để nhận biết 3 chất khí đựng trong các bình riêng biệt sau : CH4,C2H4,CO2

Exercise 1: Divide the words into three columns. checked pulled paused notified maintained wiped opened fixed wanted charged finished evaluated naked aged permitted cooked molded divided stayed closed repaired needed pushed steamed /t/ /d/ /ıd/ .................... .................... .................... .................... .................... .................... .................... .................... .................... .................... .................... .................... .................... .................... .................... .................... .................... .................... .................... .................... .................... .................... .................... ....................