giúp em với ạaaaaaaaaaaaaaaaaaaa

`(a\sqrt{a} - b\sqrt{b})/(\sqrt{a} - \sqrt{b}) + \sqrt{ab}`

thực hiện phép tính: A = 1/2 + 5/6 + 11/12 + 19/20 + 29/30 + 41/42 + 55/56 + 71/72 + 89/90 trả lời nhanh đc ctl hay nhất

help eam vs ạ nhanh cần gấp ạ cả 4 câu ạ

tìm x 27x^3-54x^2+36x=9 làm ko chép mạng nha

3. Kim loại nào sau đây là kim loại KIỀM A. Al B. Mg C. Fe D. K 4. Kim loại dẫn điện tốt nhất là A. Fe B. Al C. Na D. Ag

Chữa bài giúp+giải thích những câu sai

Cho tam giác ABC có diện tích 217.5 cm2 trên cạnh AB lấy điểm D trên cạnh BC lấy điểm E. Biết AD = 8cm BE = 1/3 BC và diện tích diện tích tam giác BDE bằng 14.5cm2. Tính độ dài AB Lm gấp giúp mk nhé

Giải giúp em Câu 49 chi tiết với ạ!!!

Use the word given in capitals at the end of each line to form the word that fits in the gap in the same line 24. It's all about their diet and ___________ that people in the Longevity Hot Spots have already found the secrets of the anti-ageing process. (LIFE) 25. Although it's impossible to control all the factors involving your skin, you can take measures to reduce the problem with the anti-glare ___________ at home. (TREAT) 26. Sugar-free foods can be helpful if you have diabetes and it is best to support overall wellness and blood sugar ___________. (REGULAR) 27. Kidney beans, almonds, sunflower seeds and walnuts are all __________, cholesterol-free sources of protein, fiber and magnesium. (EXCELLENTLY) I . Put the verbs into correct forms (1,5p). 1. He did not expect (invite)............................................ to the party. 2. (Fail) ........................................twice, he didn’t want to try again. 3. They went home after they (finish) …………………..their work. 4. (you/watch)…………………………….TV last night? 5. The teacher congratulated me on (make) ................................such a clear speech. 6. Mr Barron (study) .............................................. French since 2007. II. Rewrite the following sentences as suggested. (2,5p) 1. "What is your hobby?" Hoa asked Nam. Hoa asked.................................................................. 2. I don’t know her phone number, so I can’t call her now. If .......................................................................................... 3. I started working here 3 years ago. I have 4. "I'm terribly sorry I'm late" said Flora. → Flora apologized ......................................................................................... 5. The safeguard locked all the door. He left the office (perfect participle). → .........................................................................