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Bài 12. (1 điểm) Cho phương trình: 𝑥 − 2√𝑥 + 𝑚 = 0 (1) 1 . Giải phương trình khi m = −3. 2. Tìm m để phương trình có hai nghiệm phân biệt.

Chọn đáp án đúng 1. In ______ United Kingdom, if a cat washes behind its ears, it will rain. A. the B. an C. a D. Ø 2. Mary can’t swim. I can’t swim, ______. A. too B. either C. so D. neither 3. Your brother never goes to school by bus, ______? A. isn’t he B. is he C. doesn’t he D. does he 4. The woman ______ daughter got a scholarship to study abroad was very happy. A. who B. that C. whose D. whom 5. If you want to learn something, you’d better pay _______ in class. A. care B. notice C. attention D. respect 6. Jenny: “As far as I know, doing charity work is a really helpful thing for everyone in the society.” Mike: “_________” A. That sounds great. B. That’s fine for me. C. I’ll take part in it. D. I couldn’t agree with you more 7. We didn’t _______ to the station in time to catch the last train. A. reach B. get C. arrive D. come 8. When it started to snow, he ______ his overcoat. A. took out B. put off C. took off D. put on 9. Jane really loves the _______ jewelry box that her parents gave her as a birthday present. A. wooden brown nice B. nice wooden brown C. brown wooden nice D. nice brown wooden 10. The students _____ buy their textbooks today.The bookstore is all out of them. A. mustn’t B. can’t C. needn’t D. shouldn’t

giải phương trình căn thức bậc hai. √2x+3=5

Chừ làm thế nào để vẽ hoặc calli vậy mn

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I. JOIN THESE SENTENCES USING RELATIVE PRONOUNS BEGINNING WITH THE WORDS GIVEN. OMIT THE PRONOUN IF POSSIBLE. 1. The girl is my sister. I'm talking to the girl. The girl ……………is my sister. 2. This is the chair. The carpenter repaired it last week. This is the chair……………………………………………………… 3. She is married to a man. He is richer than her. She is married to a man ………………………………………………….. 4. She is the friend. She helped me with my homework. She is the friend...................................................................... 5. That is the swimming-pool. I used to go swimming there. That is the swimming-pool ………………………………................... 6. That is the man. His wife is a famous actress. This is the man …………………………...................................... 7. A doctor examined me last Friday. He was really kind. The doctor ………………………….was really kind. 8. The woman called the police. Her car had been stolen. The woman ………………………called the police. 9. I went to a restaurant last week. It was very expensive. The restaurant ……………………….was very expensive. 10. I saw a film last night. It was very interesting. The film ………………….was very interesting.

Giải chi tiết giúp mình tại sao `2cosx-sinx=0 ⇔ tanx=2` với ạ

chỉ cho mik cách lm summary trong 1 câu chuyện tiếng anh nhớ cho ví dụ nha.

giúp mình với mình cần gấp lắm xin cảm ơn