a. Thực hiện phép tính √18+2√45-3√80-2√ 50 b. Tìm x biết √x-2=3

cảm nhận vẻ đẹp mx trong 2 câu đầu đoạn trích 'cảnh ngày xuân'

c,x(x-1).(x+1).(x+2)=24 d,x^2-x-20=0 f,x^3-6x^2+12x+ 19=0 g,x^3+5x^2-4x-20=0 h,x^4-5x^3-12x^2-5x+1=0

Giải đúng cho mk nha Mk xin cảm ơn mọi người 5s khi trả lời hết

Cho tam giác ABC , trung tuyến AM . Kẻ BH, CK vuông góc với AM A/ CMR: BH song song với CK; BH= CK B/ CMR: BK song song với CH; BK=CH C/ Gọi E là trung điểm của BK, F là trung điểm của CH. CMR: E,M,F thẳng hàng D/ CMR: tam giác AEF cân

Tìm kiểm tra 1 tiết môn Toán của một tổ học sinh được ghi lại ở bảng tần số sau

Make your romance an affair to remember with a surprise marriage proposal. Tại sao giữa Make your romance và an affair ko có động từ liên kết ạ

Ex1: use the correct from of verbs in brackets 1.In all EXERCISES ABOUT THE ALL TENSES the world ,there(be)¬¬¬¬_____only 14 mountains (reach)_____above 8,000meters 2.He sometimes(come)____to see his parents 3.When I(come)_____,she(leave)_____for Dalat ten minutes ago 4.My grandfather never(fly)______in an airplane ,and he has n intention of ever doing so 5.We just(decide)______that we(undertake)_____the job 6.He told me that me that he(take)______a trip to California the following week 7.I knew that this road(be)_____too narrow 8.Right now I(attend)_____class .Yesterday at this time I(attend)_____class 9.Tomorrow I’m going to leave for home .When I(arrive)____on this earth airport ,Mary(wait)_____for me 10.Margaret was born in 1950.By last year ,she(live)_____on this earth for 55 years 11.The traffic was very heavy .By the time I(get)_____to Mary’s party,everyone already(arrive)_____ 12.I will graduate in June .I(see)_____you in July .By the time I(see)___you ,I(graduate)____ 13.I(visit)____my uncle’s home regularly when I(be)______a child 14.That book(be)____on the table for weeks .You(not read)_____it yet? 15.David(wash)______his hands .He just(repair)_____the TV set 16.You(be)____here before? Yes ,I(spend)____my holidays 17.We never(meet)_____him. We don’t know what he(look)____like 18.The car(be)____ready for him by the time he(come)____tomorrow 19.On arriving at home I(find)____that she just(leave)____a few minutes before. 20.When we(arrive)____in London tonight, it probably(rain)_____ 21.It(rain)____hard .We can’t do anything until it(stop)____ 22.Last night we(watch)_____TV when the power(fail)_____ 23.That evening we(stay)____up to about the town where he (like)____for some years 24.I(sit)______down for a rest while the shoes(repair)_____ 25.Half way to the office Paul(turn)_____round and (go)____back 26.London(change)_____a lot since we first(come)_____to live here 27.While we(talk)_____on the phone the children(start)___fighting and(break)____a window 28.You know to talk to us for hours about all the interesting things he(do)____in his life 29.You know she(stand)____looking at that picture for the last twenty minutes 30.I(spend)_____a lot of time travelling since I(get)____this new job 31.When we(be)_____at school we all(study)____Latin 32.When I(meet)_____him, he(work)_____as a waiter for a year 33.After he(finish)______breakfast he(sit)___down to write some letters 34.She(have)_____a hard life, but she’s always smiling 35.I think Jim(be)_____out of town

Ôtô I đi từ tỉnh A đến tỉnh B với vận tốc 40 km/h. Sau đó 1 giờ, ôtô II đi từ tỉnh B đến tỉnh A với vận tốc 65 km/h. Hai ôtô gặp nhau khi ôtô I mới đi được 2/5 quãng đường AB. Tính quãng đường AB. các nạm ơi cứu mình

a,(x-2).(x+3)-3.(4x-2)=(x-4)^2 b,x^2+5x+6=0 c,x(x-1).(x+1).(x+2)=24 d,x^2-x-20=0 e,x^4+2x^3-2xmũ2+2x-3=0 f,x^3-6x^2+12x+ 19=0 g,x^3+5x^2-4x-20=0 h,x^4-5x^3-12x^2-5x+1=0