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2 năm trước
tính giúp mình bài này ạ P(x)=9x mũ 4 + 2x mũ 2 - x + 5 Q(x)=-x mũ 3 - x mũ 2 + 4x -1 tính P(x)-Q(x)
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Mong mọi người xem và sửa giúp, đồng thời cũng mong mọi người góp ý vào bài của mình Dear Mrs. Hoa, My name is Jennifer. I’m currently a second- year student at Jamestown high school. As far as I know, you are the homeroom teacher of the first year class. So I’m writing this letter to complain about your student. In my opinion, I think that your student are the noisiest and naughtiest students I’ve seen. Do you know ? Yesterday, I saw them thrown rubbish in the school yard and I felt very angry with that action a lots. I tried to said they couldn’t throw the garbage like that but they don’t listen. Not only that, they also mocked me. I really feel unsastisfied about your class. I think that I would much appreciate it if you criticize and ban your student not litter at school yard. Also, you should teach your student behave properly and please ensure this sort of problem does not rise again anymore. Your faithfully, Jennifer

mình thắc mắc chỗ này xíu ạ: combine who 1.The singer is My Tam. She is famous for her charity work. c1: My Tam is the singer who is famous for her charity work c2: The singer who is famous for her charity work is Mỹ Tâm. 2.Samuel Johnson was the son of a bookseller. Samuel Johnson was born in 1709. c1: Samuel Johnson was the son of a bookseller who was born in 1709 c2: Samuel Johnson , who was born in 1709, was the son of a bookseller. 3. The singer is Mary. She has a beautiful voice c1: Mary is the singer who has a beautiful voice c2: Mary, who has a beutiful voice, is the singer ( cái này mình ko biết có cần thêm dấu phẩy hay ko) c3: the singer who has a beutiful voice is Mary cho mình hỏi cách nào đúng cho từng câu ạ ? Và giải thích vì sao lại đúng ạ ? Nếu có thể, cho mình thêm ví dụ được ko ?

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