Tìm m để phương trình sau có nghiệm: 1) $x^{2} + 2mx + m^2 - m = 0$ 2) $x^{2} + 2x + m - 2 = 0 $ 3) $x^{2} - (2m - 1)x + m^2 - 2m$ 4) $x^{2} + (2m - 3) + m^2 -2 = 0$ 5) $x^{2} - 2(m-1) + m^2 - 1 = 0$ 6) $x^{2} - 2(m + 4)x + m^2 - 8 = 0$

cho tứ diện ABCD có đáy là hình vuông có cạnh bằng a. tính tích vô hướng của vecto SA và vecto Bc

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Vẽ epic sans ko mạng nha Vẽ rồi kể tên 50+ au nhé

1. Bộ nào dưới đây thuộc Lớp thú? Bộ Linh trưởng Bộ Ăn sâu bọ Bộ Cá heo Tất cả các phương án còn lại đều đúng 2.Trong chương trinh Sinh học 7, số lượng bộ thuộc lớp Thú đã được học là? 6 7 8 9

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viết đoạn văn làm rõ quan niệm về chủ quyền dân tộc của nguyễn trãi qua đoạn 1 bình ngô đại cáo mình muốn ngắn gọn ạ

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Giải hộ tớ bài này với.Mình xin cảm ơn

Rewrite the sentences without change their meanings: 1. Lan didn’t go to school yesterday because of her sickness. -> Because Lan……………………………………………………………………….. 2. Because it is rain, we stopped the match. -> Because of …………………………………………………………………………____ 3. Because Tom was ill, he is absent today. -> Because of …………………………………………………………………………. 4. Because she is kind, everyone loves her. -> Because of ………………………………………………………………………….. 5. Because I was too tired, I will have a long trip. -> Because of ………………………………………………………………………….. 6. Because he passed the exam, his parent very proud of him. -> Because of ………………………………………………………………………….. 7. The house is dirty so I can’t feel comfortable. -> Because of ………………………………………………………………………….. 8. She is a beautiful girl so her husband very loves her. -> Because of ………………………………………………………………………….. 9. It’s hot so we will travel to the beach this weekend. -> Because of ………………………………………………………………………….. 10. This problem is difficult so I can’t understand. -> Because of ………………………………………………………………………….. 11. I got mark 10 in Math exam so I am very happy today. -> Because of ………………………………………………………………………….. 12. Because of the strong wind, they can’t jogging. -> Because ……………………………………………………………………………... 13. Because of his bad action, she doesn’t like him. -> Because ……………………………………………………………………………... 14. This soup is very hot. We can't eat it. (too) -> ……………………………………………………………………………................. 15. This morning is very cold. We couldn’t go swimming. (too) -> ……………………………………………………………………………................. 16. The room was very dirty. Nobody can learn it. (too) -> ……………………………………………………………………………................. 17. She can’t carry the box; it’s very heavy. (too) -> ……………………………………………………………………………................. 18. It was very late. She couldn’t go home. (too) -> ……………………………………………………………………………................. 19. The class was very tired. The teacher couldn't explain the lesson. (too) -> ……………………………………………………………………………................. 20. They can’t sleep. They aren’t tired. (too) -> ……………………………………………………………………………................. 21. She couldn’t see the film because it was very boring. (too) -> ……………………………………………………………………………................. 22. These oranges are ripe. You can eat them. (enough) -> ……………………………………………………………………………................. 23. She is old, so she can drive a car. (enough) -> ……………………………………………………………………………................. 24. The buffalo isn’t big. He can’t harm you. (enough) -> ……………………………………………………………………………................. 25. The ice is quite thick. We can walk on it. (enough) -> ……………………………………………………………………………................. 26. He is rich. He can buy the car. (enough) -> ……………………………………………………………………………................. 27. I don’t have much money. I can’t buy this dress. (enough) -> ……………………………………………………………………………................. 28. Your brother was clever. He could do this exercise in a few minutes. (enough) -> ……………………………………………………………………………................. 29. There is a lot of food in the fridge. We can eat it during the weekend. (enough) -> ……………………………………………………………………………................. 30. The truck can go through the gate because it is very wide. (enough) -> …………………………………………………………………………….................