user-avatar
nguyetskyc5
2 năm trước
giúp em câu này ạ, tìm x biết (2x +1)^2 - 4(x-1)^2
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

III. Conditionals 1. “My car broke down when I was leaving Detroit and I had to take the bus.” “___, we would have picked you up.” A. Had we known B. If we have known C. We had known D. If we did know 2. If I ___ as young as you are, I ___ in a boat round the world. A. were- would sail B. would be – would sail C. were- will sail D. would- would sail 3. If he___tickets yesterday, he ___ on the beach now. A. had booked- would be lying B. had booked- would have lied C. booked – would lie D. books- will lie 4. ___he___ hard last year, he would have lost the first prize. A. Hadn’t – studied B. Had- studied C. Didn’t study D. If – had studied 5. I ___ William with me if I had known you and he didn’t get along with each other. A. hadn’t brought B. didn’t bring C. wouldn’t have brought D. won’t bring

II. Tense 1. Last night at this time, they ................ the same thing. She.................and he............the newspaper A. are doing- is cooking- is reading B. were doing- was cooking- was reading C. was doing- has cooked- is reading D. had done- was cooking- read 2. Sam..............to change a light bulb when he................and......................... A. was trying-slipped- fell B. tried- was slipping- falling C. had been trying- slipped- was falling D. has tried- slips- falls 3. Every day I _________up at 6 o’clock, _______breakfast at seven o’clock and_______for work at 8 o’clock A. get- eat- leave B. have got- eating- leaving C. got- ate- left D. will get- have eaten- left 4. I ............ for this company for more then thirty years, and I intend to stay here until I ...........next year. A. am working- will retire B. am going to work- am retiring C. work- am going to retire D. have been working- retire 5. My mother is the first.................up and the last......................to bed A. getting- going B. to get- going C. getting- to go D. to get- to go

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team