Đáp án:
Giải thích các bước giải:
Q(x) = x^2 + 4x=0
=>xx+4x=0
=>x(x+4)=0
Th1
x=0
Th2
x+4=0
=>x=-4
Vậy x=0 hoặc x=4 là nghiệm của Q(x)
làm hộ mk 2 bài này vs làm nhanh hộ mk ạ cảm ơn ~~
My brother has worked for this company for 10 months => My brother began ……………………………………………..
tìm x , y , z biết a) x/2 = y/3 = z/5 và x + y + z = 90 b) 2.x = 3.y = 5.z và x - y + z = -33 c) x/3 = y/4 và x . y = 192
vẽ M1887 trong free fire nha.thanks
Giúp mik nha mn, 2h nộp rùi(◕︿◕✿)
Một mảnh vườn hình chữ nhật có chu vi 160m, chiều rộng 30m. Người ta trồng rau trên mảnh vườn đó, trung bình cứ 10m vuông thu được15kg rau. Hỏi trên cả mảnh vườn đó người ta thu hoạch được bao nhiêu ki-lô-gam rau ?
Complete the word in each sentence with a prefix from the box. un- im- re- over- dis- When you........ write this, make is the bit shorter My alarm clock didn't go off, and so i..... slept this morning Mary was wearing a/an......usual hat, shaped like a giant flower I don't think you are right. I......... agree completely Steve.........cooked the meat, and is was burnt in places
Giúp mình mấy câu chưa làm và mấy câu kia đúng chưa nhé.
Make a passive sentence from the words in parentheses (...) Examples: 1) That building looks very old. (when/it/build?) ..........When was it built?.............. 2) A: Is Margaret popular? B: Yes, (she/like/by everybody) ......She is liked by everybody. Exercise: 1. What happens to the cars produced in this factory? (most of them/ export?) ....................................................................................................................................... 2. A: Last night someone broke into your house. B: Oh no! (anything/take?) ..................................... 3. Mr.Kelly can't use his office right now. (it/decorate) ............................................................................................ 4. Linda didn't have her car yesterday. (it/tune-up/at the garage) ............................................................................................................... 5. The people next door disappeared six month ago. (they/not/see/since then) ........................................................................................................................................ 6. This room looks different. (it/paint/since I was last here?) ...................................................................................................... 7. A tree was lying across the road. (it/blow/down in the strom) .............................................................................................................. Nhanh giúp mình nha, mình cần gấp lắm ạ! ><
nhanh nhé mình đang gấp cả 6 bài nhé
Loga.vn - Cộng Đồng Luyện Thi Trực Tuyến