Tìm kiếm
Lường Kim Dung
3 năm trước

( x + 2x + 1 ) (x + 1) nhân đa thức với đa thức

Xem đáp án
61 lượt xem

2 câu trả lời

Hướngvtm Vtm
3 năm trước

Đáp án:

Giải thích các bước giải:

(x+2x+1)(x+1)=x2+x+2x2+2x+x+1=3x2+4x+1

Nguyễn T.Tuyền
3 năm trước

( x + 2x +1 ) (x+1 )

⇔x ² +x + 2x ² + 2x+ x + 1

⇔3x ² + 4x +1

Câu hỏi trong lớp Xem thêm

Air pollution is a cause of ill-health in (31) ________ . In many countries there are laws limiting the amount of smoke that factories can produce. Although there isn’t (32) ________ on the (33) ________ of smoke in the atmosphere, doctors have proved that air pollution causes lung diseases. The gases from the exhausts of cars have also (34) ________ air pollution in (35) ________ cities. The (36) ________ in petrol produces a poisonous gas that often collects in busy street surrounded by high buildings. Children (37) ________ live in areas where there is a lot of lead in the atmosphere cannot think as (38) ________ as other children and are clumsy when they use their hands. There are other long-term effects of pollution. If the gases in the atmosphere continue (39) ________ increase, the earths climate may become warmer. A lot of the ice near the Poles may (40) ________ and may cause serious floods. 36. A. lead B. zinc C. bronze D. steel 37. A. who B. which C. those D. whom 38. A. quick B. quickly C. fastly D. intelligent 39. A. along B. down C. toward D. to 40. A. melt B. freeze C. defrost D. flow

5
5 lượt xem
1 đáp án
7 giờ trước

Air pollution is a cause of ill-health in (31) ________ . In many countries there are laws limiting the amount of smoke that factories can produce. Although there isn’t (32) ________ on the (33) ________ of smoke in the atmosphere, doctors have proved that air pollution causes lung diseases. The gases from the exhausts of cars have also (34) ________ air pollution in (35) ________ cities. The (36) ________ in petrol produces a poisonous gas that often collects in busy street surrounded by high buildings. Children (37) ________ live in areas where there is a lot of lead in the atmosphere cannot think as (38) ________ as other children and are clumsy when they use their hands. There are other long-term effects of pollution. If the gases in the atmosphere continue (39) ________ increase, the earths climate may become warmer. A lot of the ice near the Poles may (40) ________ and may cause serious floods. 31. A. man B. men C. human beings D. person 32. A. enough information B. information enough C. enough informative D. informative enough 33. A. effect B. effects C. affect D. affects 34. A. increasing B. increased C. decreasing D. decreased 35. A. the most B. most of C. most D. every

3
3 lượt xem
1 đáp án
7 giờ trước

Air pollution is a cause of ill-health in (31) ________ . In many countries there are laws limiting the amount of smoke that factories can produce. Although there isn’t (32) ________ on the (33) ________ of smoke in the atmosphere, doctors have proved that air pollution causes lung diseases. The gases from the exhausts of cars have also (34) ________ air pollution in (35) ________ cities. The (36) ________ in petrol produces a poisonous gas that often collects in busy street surrounded by high buildings. Children (37) ________ live in areas where there is a lot of lead in the atmosphere cannot think as (38) ________ as other children and are clumsy when they use their hands. There are other long-term effects of pollution. If the gases in the atmosphere continue (39) ________ increase, the earths climate may become warmer. A lot of the ice near the Poles may (40) ________ and may cause serious floods. 31. A. man B. men C. human beings D. person 32. A. enough information B. information enough C. enough informative D. informative enough 33. A. effect B. effects C. affect D. affects 34. A. increasing B. increased C. decreasing D. decreased 35. A. the most B. most of C. most D. every 36. A. lead B. zinc C. bronze D. steel 37. A. who B. which C. those D. whom 38. A. quick B. quickly C. fastly D. intelligent 39. A. along B. down C. toward D. to 40. A. melt B. freeze C. defrost D. flow

3
3 lượt xem
1 đáp án
7 giờ trước

Giải các phương trình sau

|5x-4|=|4-3x|

|x-2|=18-3x

|5-2x|+x=1

2
2 lượt xem
2 đáp án
7 giờ trước

Choose the best answer.

We are looking for ____ place to spend ____ night.

363
363 lượt xem
1 đáp án
2 năm trước

Choose the best answer.

Please turn off ___ lights when you leave ___ room.

319
319 lượt xem
1 đáp án
2 năm trước

Choose the best answer.

I like _____ colorful costumes of ____ ethnic minority people in Vietnam.

275
275 lượt xem
1 đáp án
2 năm trước

icon Hỏi bài tập
Đề thi - đề kiểm tra Xem thêm
Học lý thuyết Toán Học Lớp 8 vững kiến thức đứng top 1 lớp
Dành cho bạn Xem thêm