user-avatar
nanana2000
2 năm trước
cho pt: x^2 - (m+1) x + m= 0 a) cm pt luôn có nghiệm với mọi giá trị của m b) tìm giá trị m để pt có 2 nghiệm x1,x2 thoả mản: x1^2 + x2^2 = (x1 - 1)(x2 - 1) - x1 - x2 + 4
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

1. If you (send) ____________ this letter now, she (receive) ______________ it tomorrow. 2. If I (do) ______________ this test, I (improve) _______________ my English. 3. If I (find) _____________ your ring, I (give) _____________ it back to you. 4. Peggy (go) ____________ shopping if she ( have) _____________ time in the afternoon. 5. Simon (go) _____________ to London next week if he (get) ___________ a cheap flight. 6. If her boyfriend (phone/not) ____________ today, she (leave) _________ him. 7. If they (study/not) ______________harder, they (pass/not) ______________ the exam. 8. If it (rain) _____________ tomorrow, I (have to/ not)_____________ water plants. 9. You (be able/ not) ___________ to sleep if you (watch) ___________ this scary film. 10. Susan (can/move/not) _____________ into the new house if it (be/not) ____________ ready on time. 11. If I (study) ___________, I (pass) ____________ the exams. 12. If the sun (shine) ____________, we (walk) ______________ into town. 13. If he (have) ___________ a temperature, he (see) __________ the doctor. 14. If my friends (come) ____________, I (be) ___________ very happy. 15. IF she (earn) ___________ a lot of money, she (fly) ___________ to New York. 16. If we (travel) ____________ to London, we (visit) ____________ the museums. 17. If you (wear) ____________ sandals in the mountains, you (slip) ____________ on the rocks. 18. If Rita (forget) _____________ her homework, the teacher (give) _________ her low mark. 19. If they (go) _____________ to the disco, they (listen) ____________ to loud music. 20. If you (wait) ___________ a minute, I (ask) ___________ my parents.

1. My dog ___ bark unless it is hungry. A. don’t B. won’t 2. Unless you ___ to go to bed early, we should go out. A. wants B. want 3. ___ you don’t slow down, we are going to crash! A. If B. Unless 4. You cannot go into bars ___ you are over 18. A. If B. unless 5. In my country, ____ you cannot speak English, it’s hard to get a good job. A. if B. unless 6. She’ll fail the exam if she ___ study. A. if B. doesn’t 7. We’ll be late ____ we leave soon. A. if B. unless 8. ___ I am not feeling better tomorrow I will go to the doctor’s. A. Unless B. If 9. ____ you do not make the payment in time, your car will be confiscated. A. If B. Unless 10. You will lose your job ___ you change your attitude and become friendlier. A. unless B. If 11. She won’t know the truth ___ you tell it to her. A. unless B. if 12. ____ you arrive early, you’ll be able to meet the customers before the meeting. A. Unless B. If 13. ____ she eats healthy food, she won’t lose some weight. A. Unless B. If 14. They won’t arrive on time ___ they finish the work early. A. unless B. if 15. Will she able to eat some cake ___ I put eggs in it? A. unless B. if

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team