+)XÉT
X(X+Y+Z)+Y(X+Y+Z)+Z(X+Y+Z)=-5+9+5
=>(X+Y+Z)(X+Y+Z)=9
=>X+Y+Z=±3
VỚI X+Y+Z=3
+)Y(X+Y+Z)=9
=>3Y=9
=>Y=3
+)X(X+Y+Z)=-5
=>3X=-5
=>X=-5/3
+)Z(X+Y+Z)=5
=>3Z=5
=>Z=5/3
VỚI X+Y+Z=-3
=>-3X=-5
=>X=5/3
=>-3Y=9
=>Y=-3
=>-3Z=5
=>Z=-5/3
CHÚC BẠN HỌC TỐT !!!
III. Give the correct form of the verbs in bracket 1. The statue (break) while it (move) to another room in the museum 2. It's the first time he (win ) the school prize 3. It's the high time you (take) care of yourself 4. They boy kept (sing ) that song. 5. I learnt English very hard so that I (have) a good job in the future 6. If the weather (not be) bad today, we (go) camping on the mountain 7. My mother 'd rather I (not/be) lazy 8. My sister always made my mother (cry) 9. I suggest that we (plan) many tres in front of our school 10. .Your report should (write) in English 11. .I learned to swim when I (be)very young. I (teach) by my father 12. Yesterday the police reported that they (capture) the thief VI. Rewrite these sentences that have the same meaning, using suggested words in the 1. I usually walk to work but today I drove. ( instead) 2. he information I got from the assistant was so confusing that I didn’t know what to do. (such) 3. Oh, sorry Jane, you are not lucky to day. (out) 4. Although the weather was bad, we went to school on time. (spite) 5. Maths is difficult for her to learn (find) 6. She hasn’t called me since I moved here (last) 7. Mr. brown feeds the chicken. He collects their eggs. (not only....... but also) 8. The man was taken to the local hospital. He was injured in the accident.(past participle) 9. The musician is internationally famous. He appeared in the concert last night.(present participle) 10. His explanation is not clear. The examples he gives are not clear. ( neither........nor)
A= 2+2^3+2^4+2^5+.......+2^2009 B=1+2^2+2^4+2^6+2^8+....+2^200 C=5+5^3+5^5+5^7+...+5^101
∩ dấu này là gì vậy mong mn giúp đỡ
Vậy đố các bạn 1254+15+1+5+8+4+5+8+85+1+5+8+4+8+3 bằng mấy
Ai giúp mình làm bài 2 trong hình với
Giải thích tại sao có sự khác nhau giữa kiểu khí hậu gió mùa và khí hậu lục địa Châu Á ?
Giải chi tiet bài này giúp mình nha
Tìm min hoặc max của biểu thức sau: $A=\frac{x^2-6x+12}{x}$
trong truyện thạch sanh .từ đầu cho đến cậu con trai.có bao nhiêu cụm danh từ trong đoạn văn. ai biết trả lời giùm mình với
IV. Rewrite these sentences that have the same meaning 1. Trung’s parents gave him a mobile on his birthday. 1. Trung 2. Please don’t make any noise; I'm very tired. 2. I'd rather 3. This is the best computer I have ever used. 3. I have 4. He hasn’t chatted with his classmates through the internet for ages. 4. It's ages 5. We haven't seen her since we left university. 5. The last 6. I will call the police if you don't leave me alone ! 6. Unless 7. It's a pity I didn't take my doctor's advice. 7. I wish 8. Who wrote the novel “The adventure of Tom Sower"? 8. By whom 9. The train couldn't run because of the storm 9. The storm 10. Living in the city is exciting. 10. Some people 11. Practice speaking everyday or you can't improve your English 11. If you 12. We couldn’t go to school this morning because of the heavy rain 12. Because 13. “Have you got any shampoo, Alice. I must wash my hair” Johnny asked 13. Johnny said 14. He said to me “Listen! Can you hear something coming?” 14. He asked me 15. They think that the prisoner escaped by clibing over the world 15.The prisoner is
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