giúp với U ω U Rút gọn biểu thức A =(x ²+2) ² - ( x + 2)(x - 2)(x ²+ 4) đc kết quả là: A.-4x ² + 20 B. -2x^4 + 4x ² - 12 C. 4x ² + 20 D. Đáp số khác

tìm giá trị nhỏ nhất của $\frac{1}{√x-x}$

Một số tăng lên 25% thì phải giảm đi bao nhiêu % để được lại số cũ

Fill in the blank with the conjunctions in the box. ______________________________________ |and|so|but|because|although|or| 1. Read over your answers_________correct all mistakes before you hand them in. 2. ____________Jim doesn't like this game show, he watches it almost every Friday. 3. Nadia doesn't like drive,___________ she takes the bus everywhere. 4. He is very rich, ________ he doesn't spend a lot of money. 5. To get from Vancouver to Victoria, you can fly_________ you can ride the Ferry 6. Thomas was really hungry this morning________________ he didn't eat breakfast. 7. I have a lot of homework to do,___________________ I can't go to the cinema with you. 8. The waiter was not very nice, ______________ the food was delicious. 9. We enjoyed the film________________ it had a sad ending. 10. She went to see a doctor__________her back was painful.

Topic: write a paragraph about difficulties your mom has to face in life.

-12(x-5)+7(3-x)=5 mình đg gấp nhanh nha

Giúp mk với ạ Choose the best answer 1. My bicycle...............last night. A. has been stolen B. was stolen C. stole D. is stolen. 2. A lot of champagne.....................at the New Year’s Eve every day. A. is drunk B. has been drunk C. will be drunk D. are drunk 3. The problem is very difficult. It.................... A. can’t solve B. couldn’t solve C. can’t be solved D. solved 4. All the school in this area........... immediately A. improve B. have to be improved C. have to improve D. are improving 5. In order to keep our environment clean and green, a lot of trees........... A. should plant B. shouldn’ be planted C. should be planted D.are planted 6. Why don’t you have your car.............? A. wash B. washed C. to wash D. washing 7. The National Stadium............next Sunday. A. open B. will open C. will be open D. will be opened. 8. Some one must meet him at the railway station A. He must be at the railway station B. He must be met at the railway station C. He must be meet at the railway station D. He must have been met at the railway station

Giải hộ mk vs ạ giải phương trình. 2x+1=15-5x

Nhà Minh lấy cớ nào xâm lược nước ta đó có phải là nguyên nhân chính không

Bài 1 giải các phương trình A)2019x - 2020=0 B)(3x + 1)² - 49=0 C)3x -5=6x +10 D)x² -9x+14=0