a) Cho a ≥0 và b<0. Rút gọn biểu thức: P = √a ² - √b ² b) Thực hiện phép tính ( √12 + √75 ) √3 giải dùm mình nhe, mình cảm ơn

1. Conservation also includes searching_________ alternative fuels, such as the energy of the Sun. 2. These days everybody is aware___________ the dangers of smoking. 3. Clean air provides us__________ a healthy supply of oxygen. 4. When wastes are poured _________ the atmosphere, the air becomes contaminated and unpleasant to breathe. 5. Some large cities may have to ban cars_________ the city centre to wipe _________ smoke. 6. The fight___________ pollution of our environment is important as well. 7. People used to believe that the world’s natural resources could never be used__________. 8. Conservation is also concerned_________ the reclaiming of land. 9. Protect your child_________ direct sunlight by using a sunscreen. 10. Vehicles account________ air pollution in the city.

REWRITE THE SENTENCES WITHOUT CHANGING THEIR MEANING 1. this is the first time i have ever met such a pretty girl -> she is .... 2. he works much. he feel tired. -> the more .... 3. the apartment is big. the rent is hight. -> the bigger.. 4. we set off soon . we will arrive soon -> the sooner.. 5. the joke is good. the laughter is loud -> the better.. 6. she gets fat. she feels tired -> the fatter.. 7. as he gets older, he wants to travel less -> the older.. 8. the children are excited with the difficult games -> the more.. 9. people dive fast. many accidents happen -> the faster... 10. i meet him much. i hate him much -> the more ... 11. my boss works better when he is pressed for time -> the less.. 12. as he has much money, he wants to spend much -> the more... 13. if you read many books , you will have much knowledge -> the more ... 14. he speaks too much and people feel bored -> the more.. 15. the growth in the economy makes people's living condition better -> the more... 16.people learn a lot of things as they travel far -> the farther.. GIÚP MIK VỚI , NHỚ PHẢI ĐÚNG NHÉ. VOTE 5 SAO

Lớp 1B có 45 bạn, lớp 1C có 50 bạn. Hỏi cả hai lớp có tất cả bao nhiêu bạn?

Choose the words whose underlined part is pronounced differently from that of the others in each group.(chọn từ phát âm khác với từ còn lại) A. theory B. thick C.though D.thought

Giúp em vs ạ! Dạ em cảm ơn nhiều

hãy viết một đoạn văn miêu tả hình ảnh bác trong một đêm không ngủ

Multiple stars and clusters là gì

Phân tích đa thức thành nhân tử c) (x^10 + y^10)(x^2+ y^2) - (x^8 + y^8)(x^4 + y^4)`

X . Rewrite the sentences so that they have the same meaning as the original ones 1. We will use renewable in the future - Renewable energy 2. This is our house - This school is 3. what is the distance between Vinh and Ha Noi city? - How 4. Although they are short, they still love playing sports - In spite of 5. I often walked to school when I was a student - I used