c : x^2 -7 ;d : x^2 + 4 e: x^3 - 4x; g :2x^2-5x-3 giúp mik vs ạ 5 câu nha h : x^3 + x^2 + 2x +2

giải phương trình $x^{3}$ -$3x^{2}$ -3x+2$\sqrt{(x+1)^{3}}$

Xin mooiz đáp án thôi ạ.Càng nhnh càng tốt

Trung bình cộng của 2 số là 92 . Thương là 3 , tìm 2 số

Làm những câu dễ là được.Nhanh gius mk p

Giup minh voi ạ cám on mn nhieu

cho phương trình $x^{2}$-(m+1)x+2m-2=0, m là tham số a) chứng minh rằng với mọi giá trị của tham số m thì phương trình luôn có nghiệm. b) tìm tất cả các giá trị của tham số m để phương trình có hai nghiệm dương phân biệt x1,x2 tm: $\sqrt{x1+2}$ -$\sqrt{x2+2}$ =1 c, tìm tất cả các giá trị của tham số m để phương trình có 2 nghiệm x1,x2 thỏa mãn $x1^{2}$ -(m+1)x2+m-2=0

Mn làm dùm e câu2 a nha e chỉ cần KT kq thôi mn giúp nhà .....,.....

2. There is …… to be frightened of my dog, he is so friendly and harmless. A. any reason B. no fear C. a fear D. no need 3. Dick still arrived at the airport on time …… a traffic jam on his way there. A. in spite B. despite C. although D. even 4. Dick: “The storm last night completely destroyed Tom’s farm, he is now disappointed.” Peter: ………………….! Let’s go there and give him a hand. A. What is it B. How poor C. Poor him D. Tom is poor 5. …… we are, the more satisfied our parents feel. A. The better B. The best C. The good D. The well 6. …… the students I met in that school were very friendly and helpful. A. A little B. Some C. Some of D. A few 7. This Italian restaurant is …… with those who enjoy Italian food. A. popular B. popularity C. popularly D. population 8. I found out some mistakes in my essay when I …… words in the dictionary. A. look on B. looked up C. got down D. turn off 9. If we …… solar panels on the roof of our house, we will save a lot of money for electricity. A. to install B. to replace C. install D. placed 10. Mrs. Green, …… is my English teacher, has just come back from London. A. which B. who C. whom D. that II. Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correcting in each of the following sentences. 11. The electrician suggested to use energy-saving bulbs instead of ordinary ones. A B C D 12. I wish I have a private plane so that I could fly around the world. A B C D III. Read the texts and mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each question. Text 2 A STRANGE ANIMAL A cat is one of the strangest creatures on the Earth. Even though it has lived with man for thousands and thousands of years, it seems to be just one step removed from the jungle. A cat is closely related to such animals as the lion, tiger, and leopard, and in its own way it behaves like them. For instance, cats lie in silence and wait for their victims, and then spring on their back, just the way a lion can kill an enemy. A cat can make a tremendous leap in the air, as much as seven feet straight up. A cat has paddled feet so that it can stalk its prey in absolute silence. It has eighteen claws on its feet that it can pull draw back again. What make a cat able to see in the dark? It has eyes that can adjust themselves to different amount of light. When there’s bright light, the pupils of the eyes become narrow slits. When it’s dark, the pupils become wide, almost the size of their entire eye. This does not mean that a cat can see in the absolute darkness, but it needs much less light than most animals. Because a cat eyes round out from the head, it collects the light from a wide angle. When a cat’s eye reflects all this light, it seems to glow. 18. The word “them ” in line 4 refers to …… A. other cat B. other animal C. other cats D. other animals 19. How many claws are there on a cat’s feet? A. sixteen B. seventeen C. eighteen D. nineteen 20. Why is a cat able to see in the dark? - Because ……… A. it has eyes that can adjust themselves to different amount of light B. it has lived with man for thousands and thousands of years C. a cat has paddled feet D. it needs much less light than most animals 21. What is NOT TRUE about a cat? A. A cat is one of the strangest creatures on the Earth B. A cat is closely related to such animals as the lion, tiger, and leopard C. It has eighteen claws on its feet that it can pull draw back again D. A cat is unable to see in the dark 22. What is NOT mentioned in the text? A. tiger B. dog C. leopard D. lion

Hãy giải thích giống động vật lai và giống động vật thuần chủng( giải thích để chủ tus hiểu nha )