a, `10x²+x+10=0`
Có: `∆ = b²-4ac = 1²-4.10.10 = -399 <0`
`=>` pt vô nghiệm.
b, `\frac{7x-3}{x-1} = \frac{2}{3}`
Đk: `x≠1`
`<=> 3.(7x-3) = 2.(x-1)`
`<=>21x-9 =2x-2`
`<=> 21x-2x=-2+9`
`<=> 19x=7`
`<=> x =7/19` (TM)
Giải bài này cho tui với mn ơi !!
Exercise 5: Complete sentences with which, who, in which, of which, whose, whom... 1. February, which is the second month of the year, is the month ___________ many of my colleagues take vacation for skiing. 2. The dress ___________ the movie star is wearing weighs about fifty pounds. 3. Playing fetch, our dogs, ran after the tennis ball ___________ bounced across the kitchen floor. 4. The old words you see on the board, most ___________ were becoming obsolete, are now trending again. 5. The family ___________ house was decorated the most beautifully for the holidays will receive a trophy. 6. A group of Green Peace members, many ___________ love nature, are having a fundraiser for their cause. 7. Flying squirrels ___________ live in tropical rain forests spend most of their time on the trees. 8. The pyramids of Egypt, ___________ were constructed more than 2,000 years ago, are listed as one of the seven wonders of the world. 9. Those people ___________ refused to show proper identification were not allowed into the building. 10. He likes shopping between one and three o'clock, ___________ most people are at work. 11. At the end of this month, scientists will conduct an important experiment, the results ___________ will be published within 6 months. 12. The researchers are doing case studies of people ___________ families have a history of high blood pressure and heart disease. 13. At the conference, professor will describe the basic process ___________ cotton thread is made. 14. I left my son at the campus day-care, ___________ is available to all full-time students with young children. 15. Nurses ___________ truly care about their patients are very much needed.
"Tuổi nhỏ làm việc nhỏ Tùy theo sức của mình" Từ lời dạy của Bác Hồ, em viết đôi dòng suy nghĩ (đoạn văn từ 6-8 câu)về những nguyện ước nhỏ bé của mình
Phát biểu thành lời mệnh đề sau: ∀n ∈ Z : n + 1 > n Mệnh đề này đúng hay sai ?
Giúp mình làm nốt ạ Giải thích hộ Cảm ơn
Complete each paragraph with one set of words (not in the order listed) a / both / each / half his / my / these / those his / much / some / the a little / most / some / thirty a few / our / that / this A. I got (1) ........................... earrings, the small ones I’m wearing, from (2) ........................... grandmother. I really didn’t like (3) ........................... green earrings that Andy brought back from (4) ........................... trip to Sri Lanka. B. Look at (5) ........................... photograph here in the newspaper. Doesn’t it remind you of (6) ........................... strange woman who came to teach (7) ........................... French class for (8) ........................... weeks last year? C. Peter wasn’t paying (9) ........................... attention to the lecture when Angela leaned over and tapped him on (10) ........................... shoulder. As he turned, she pointed to (11) ........................... notepad and whispered, ‘Can I borrow (12) ........................... paper?’ D. Although there are (13) ........................... mountain peaks that receive over (14) ........................... inches of rain annually, (15) ........................... of Arizona has a warm, dry climate with only (16) ........................... rain in winter. E. When two horses in (17) ........................... race finish together at exactly the same time, it’s called a dead heat. It means that (18) ........................... of them win and (19) ........................... of them receives (20) ........................... the prize money.
im got a more rockin' toxic nghĩa là gì ạ
1/4 tấn =…kg 180000=…m vuông 4km vuông =…m vuông 1/5m vuông =…cm vuông
1. Every week, there are two ________________ from Ha Noi to Nha Trang. (fly) 2. It’s difficult to find ______________________ at husy time. (accommodate) 3. The next ________________________ for New York will be at 11.00. (depart) 4. The _____________________ of Flight 106 from Boston has been delayed. (arrive) 5. _________________, dark clouds soon appeared and it began to rain. (fortunate) 6. There are __________________ fights from Ho Chi Minh City to Nha Trang. (day) 7. My family live in a northern __________________________ region. (mountain) 8. The Olympic Committee gave official ___________________ to the sport. (recognize)
viết một đoạn văn khoảng 5 câu tả hình dáng hoặc công dụng của một đồ vật gần gũi với em
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