$x^{2}$ -2x - $m^{2}$ + 1 Tìm x theo m

vẽ anime hoặc đậu mầm NL : Các pác vào đây vote nhiệt tình để e còn chốt link ở dưới nah

Giúp e với ạ B Circle the correct answers. 1 You have to be prepared to work hard if you want to achieve / accomplish your goals. 2 The office is equipped with cutting edge data / digital technology. 3 Paula insisted / persisted that I accept her proposal. She just wouldn’t take no for an answer. 4 Our firm is proud that we never distinguish / discriminate among our employees based on gender or race. 5 He is a very industrial / industrious young man – always the first to arrive and the last to leave the office. 6 I need your help in solving / resolving some problems I’m having with this project. 7 Samantha got into medical school and is well on her way to understanding / realising her dream of becoming a doctor. 8 I chose this profession because I love it, even though I always knew I would never accrue great riches / richness from it. 9 Just because the last business you tried to set up was a defeat / failure, it doesn’t mean you shouldn’t try again. 10 New technologies are bringing about a(n) revolution / evolution in the way we teach

D Complete the sentences using the correct form of the verbs in brackets. 1 I ___________ (think) about looking for a new job for some time now. 2 The professor claimed that the student ___________ (cheat) on his exams all along. 3 Where were you when I ___________ (work) all day to finish the project before the deadline? 4 I ___________ (not come) into the office tomorrow; I’ve taken the day off. 5 The weather seems to be getting worse. ___________ (you / bring) an umbrella with you? 6 You ___________ (look) really tired. Why don’t you go home and get some rest? 7 Sarah ___________ (cook) for her guests all day, and in the end, she was too tired to enjoy her own party! 8 By the time he turned thirty, Steve ___________ (already / make) his first million. 9 My mum ___________ (teach) me to play the piano when I was a kid. 10 He is such a self-centred man that he believes the whole world ___________ (revolve) around him. 11 Sorry I didn’t have time to return your call. I ___________ (type up) reports all morning. 12 ___________ (you / decide) when you want to take your holiday this year, yet?

giúp mình gấp với mình sắp phải nộp, cảm ơn mng

Phân tích đa thức thành nhân tử a. x²(1-x²) - 4 - 4x² b. x² + y² + xy - x - y c. (1+2x)(1-2x) - x(x-2)(x-2) d. x⁴ + 2x³ + 2x² + 2x + 1

giúp mình giải chi tiết câu 2 nha mình cần gấp, oke mình vote 5 sao

Đốt cháy hết m kg cacbon trong oxi thu được 67,2m ³(đktc)hỗn hợp khí X có tỉ khối với Hiđro bằng 16 .Lấy 2,24 lít X sục vào dung dịch Ca(OH)2 dư thu được 2 gam kết tủa ,viết pt,tính m và phần trăm về thể tích các khí trong X

Ai giải giúp bài này đi mik vote 5sao, ctlhn luôn

Cho 19,5 kim loại kẽm Zn tan hoàn toàn trong dung dịch axit clohidric Hcl , sau phản ứng thu được V lít khí không màu (đktc) a) viết phương trình hóa học của phản ứng và tính V b) tính khối lượng của axit clohidric đã tham gia phản ứng c) nếu dùng toàn bộ khí không màu thu được để khử 19,2 g sắt (III) oxit , thì sau khi phản ứng kết thúc thu được bao nhiêu gam sắt ?