Tìm m để pt x2-2mx+m2+m-5=0 có 2 nghiệm phân biết x1,x2 thỏa mãn 2(x1^2+x2^2)-3x1x2=29

giúp tôi giải bài này với, cảm ơn trước :)

nhà ông có 4 cây đào .nhà bà có 9 cây đào hỏi tổng có bao nhiêu cây đào

trong hộp có 6 viên bi xanh và 8 viên bi đỏ. ko nhìn vào hộp, hỏi phải lấy ra ít nhất bao nhiêu viên bi để có không ít hơn 3 viên bi xanh và 4 viên bi đỏ

Cho hai biểu thức $A=\dfrac{\sqrt[]{x}+4}{\sqrt[]{x}-1}$ và $B=\dfrac{3\sqrt[]{x}+1}{x+2\sqrt[]{x}-3}-\dfrac{2}{\sqrt[]{x}+3}$ (với $x\geq 0$, `xne 1`) Tính giá trị của biểu thức A khi x=9 Chứng minh $B= \dfrac{1}{\sqrt[]{x}-1}$ Tìm tất cả giá trị của x để $\dfrac{A}{B}\geq\dfrac{x}{4}+5$

Cho 5 đoạn ADN mạch kép có chiều dài bằng nhau thuộc 5 tế bào khác nhau: ADN I : Có A = 2.107; G = 3.107. ADN II : Có A = 3.107; G = 2.107. ADN III: Có A = 10%. ADN IV: Có A = G. ADN V : Gồm toàn bộ A và T. Hãy sắp xếp theo thứ tự đoạn ADN có số liên kết hiđrô nhỏ dần. Giải thích.

Vẽ chữ " Buff " Kí chữ @Ku Nhanh và đẹp mik cho hay nhất

nhà thành có 5 cây chuối,ngày hôm sau,bác hoàng lại nhập thêm 15 cây chuối nữa.hỏi có tổng bao nhiêu cây chuối

help câu 4 vs ae ,hứa vote 5 sao và câu trả lời hay nhất.

2. Change these sentences into reported speech 1. John said to Mary, “I will give you a new bike next summer.” John told ................................ 2. “I’m looking for the book you gave me last week,” Mary said to Peter. Mary told Peter................. 3. Tom said: “I must leave now.” Tom said ................... 4. "I cannot drive you home," he said to her. He said .................. 5. "Peter, do you prefer tea or coffee?" she said. She asked Peter ........ 6. "I will go to the movie with you," he said to me. He promised ................ 7. I asked him: “How do you go to school?” I asked .............................. 8. “Why do you come home late,” James asked him. James asked ...................... 9. He said to me, “Keep a seat for me in the theatre.”  He told me ..................... 10. "Don't play on the grass, boys," she said. She ...................... 11. They said: “We are doing the exercise now.” They said ....................... 12. The police said : “ Don’t touch anything in this room, everybody. ” The police ..................... 13. Mrs. Green said to her friend : “ Can you help my son with his literature ? ” Mrs. Green asked her friend ................................................................................................................................................. 14. “ You shouldn’t translate each sentence into Vietnamese ”, his brother said to me His brother advised me ................................................................................................................................................. 15. “You should learn words and do exercises in order to get good grades”, my teacher said. My teacher advised me ................................................................................................................................................. 16. “ You have to take part in the rice-cooking contest tomorrow”, Nam’s father said. Nam’s father said ................................... 17. “It was raining all day yesterday in Nha Trang”, my pen pal said. My penpal said ...................... 18. “We are waiting for the school bus now”, the children said. The children said ........................... 19. My friend said ,“ I have already written this letter”. My friend said .................. 20. Carol said to me, “I will ask Mr. Wilson about this lesson the next day”. Carol told ................................ 21. Her friend said to her, “I don’t understand these lessons carefully”. Her friend said ........................... 22. Mr. Quang said ,“I must leave right now”. Mr.Quang said ............................... 23. Charles said to Jane, “I have to leave the office before 3.30 pm” Charles told ...................... 24. Helen asked the child, “Are you going to visit your uncle tomorrow ?” Helen asked ........................ 25. She asked her friend, “Do you go to school by bike today ?” She asked her friend .................................. 26. The man said to his daughter, “ Did you feel sick yesterday ?” The man askedd ............................ 27. “Did you go climbing yesterday, Minh”, Mrs. Ngoc asked her son. Mrs. Ngoc asked her son ................................................................................................................................................. 28. Jim asked Laurence, “How many students are there in your class this year ?” Jim asked Laurence .......................... 33. “What was Mr. Minh doing at this time yesterday ?”, Ngoan said Ngoan asked ................. 34. The men asked Mary, “How long have you waited for this doctor ?” The men asked Mary ........................... 35. I said to the salesman, “How much does this dress cost today ?” I asked the salesman .............. 36. They said to her, “Where will your father leave here for the USA ?” They asked her ........................... 37. Minh said, “Which of these pictures do you like best, Mr. Hung ?” Minh asked ............................................ 38. Hang said: “Why doesn’t Ha buy them this picture as a wedding present?” Hang asked ............ 39. “I can’t work at all! My typewriter isn’t working properly,” she said She said ...................... 40. The customer told me, “Can you speak English or French ?” The customer asked me ............................