rút gọn biểu thức 2x^2 (-3x^3+2x^2 +x-1)+2x(x^2-3x+1)

Chứng minh rằng : a) $\frac{a+b}{b}$ = $\frac{c+d}{d}$ b) $\frac{a-b}{a}$ = $\frac{c-d}{d}$ c) $\frac{a}{a-b}$ = $\frac{c}{c-d}$

chọn đáp án đúng nhất: 1. A noun clause can begin with: A.Although B.What C.Because D.However 2. I'm studying very hard at the moment _____ pass my exams next week. A.so that B.in order that C.to D.in order not 3. Complete the following sentence in an e-mail. “I ………… to ask you a few questions about your product.” A.look B.would C.would like D.am 4. The waiter was not very nice; _______, the food was delicious. A.however B.therefore C.moreover D.because Reset Selection 5. Complete the concluding sentence in an e-mail. “I ……….. to doing business with your company in the future.” A.look B.looks forward C.look forward D.looking 6. Complete the following sentence: “Would you mind ………. us with a new printer since the old one is out of order?” A.providing B.provide C.to provide D.provides

His future house will look like a …………on the mountain A. city B. country C. UFO D. TV

Giúp mk hết nha Nhớ ko spam và Tl ko liên quan đến câu hỏi Ai trl đi mk cho ctlhn

Nhờ ;àm giúp câu C . Ch/ m D là trung điểm MN. Cám ơn

Bài 1. Fill the " prep " in the blank 1. To play badminton is difficult ? => It's .......................................... 2. She spends fifteen minuter making a big cake => .............................................. 3. Why don't we eat cut => What about ........................... 4. Nam is more internet than Ha => Ha isn ...................................

Cho tam giác ABC cân tại A. Phân giác góc A và góc B cắt nhau tai I. Biết, AI = 2 căn 5cm; IB = 3 cm. Tinh AB giúp e vs ạaaaaaaa E vote 5*

vẽ đậu mầm cute phô mai que nha mn ơi

Hộ mik bài trg ảnh ,ko cần làm bài đã làm