Hướng dẫn trả lời:
$\text{P(x) = $x^{4}$ - $5x^{3}$ - $4x^{2}$ + 5x - 3 - $x^{4}$ + $5x^{3}$ + $4x^{2}$.}$
$\text{P(x) = ($x^{4}$ - $x^{4}$) + (- $5x^{3}$ + $5x^{3}$) + (- $4x^{2}$ + $4x^{2}$) + 5x - 3.}$
$\text{P(x) = 0 + 0 + 0 + 5x - 3.}$
$\text{P(x) = 5x - 3.}$
⇒ $\text{P(0) = 5.0 - 3 = 0 - 3 = -3.}$
$\text{Vậy P(0) = -3.}$
P(x)=$x^{4}$-5$x^{3}$-4$x^{2}$+5x-3-$x^{4}$+5$x^{3}$+4$x^{2}$
P(x)=($x^{4}$-$x^{4}$)+(-5$x^{3}$+5$x^{3}$)+(-4$x^{2}$+4$x^{2}$)+5x-3
P(x)=5x-3
P(0)=5.0-3
P(0)=0-3
P(0)=-3
tầng lớp nào sau đây có địa vị và quyền lực cao nhất trong xã hội nước ta từ khi bị phong kiến phương bắc thống trị
rút gọn biểu thức (lời giải chi tiết, dễ hiểu)
Vẽ anime nữ ko nhận tranh cũ xấu = bc đúng luật hoidap nhé
Đề thi học kì 2 lớp 8 môn tiếng Anh A.phonetics: Circle the letter A, B, C or D before the word in each group that has the underlined part pronounced differently from the rest. (1m) 1. A. promised B. hopped C. booked D. burned 2. A. though B. ought C. thought D. bought 3. A. hard B. carry C. card D. yard 4. A. cool B. food C. look D. flood B. Vocabulary & Grammar: Circle A, B, C or D to complete the following sentences. (4ms) 1. The teacher told him ___________ up late. A. to not stay B. to stay not C. to stay D. not to stay 2. My father is good at ____________ English. A. speaking B. spoken C. speak D. to speak 3. We are all ________ that you passed your English exam. Congratulation! A. relieved B. afraid C. delighted D. certain 4. “__________to come and have dinner with us?” “I’d love to but I’m very busy”. A. Would you mind B. Could you please C. Would you like D. Do you enjoy 5. I am very interested __________ the information you have given me. A. on B. in C. of D. at 6. Can you tell me where ______________ ? A. she does B. does she C. she is D. is she 7. You have to work ____________ for the coming exam. A. hardly B. more hardly C. more hard D. hard 8. While Hoa ____________ , the phone rang. A. was eating B. were eating C. eat D. eats 9. The Le family was sleeping when the mailman ____________ A. come B. came C. to come D. comes 10. She often spends her weekend ___________ through pleasant open countryside. A. travel B. traveling C. to travel D. to traveling 11. I was reading a book when Mary ____________ in. A. came B. comes C. coming D. come 12. We ............... TV at 8 o’clock last night. A. are watching B. were watching C. watched D. watch 13. There are three competitions: water-fetching, ____________ and rice cooking. A. making-fire B. fired-making C. fire-making D. fired-make 14. It’s Lan’s daily mistake. She is always____________ to school late. A. come B. coming C. comes D. came 15. I don’t know how ____ the game. A. playing B. to play C. played D. can I play 16. Millions of Christmas cards___ every year. A. were sent B. send C. is sending D. are sent C.Writing: a. Put the verbs in brackets in the correct forms or tenses.(1m) 1/ When he came, I ( listen )___________ to music. 2/ Tam ( already know ) _____________ my mother 3/ The house ( build ) _____________ over fifty years ago . 4/ He said that he ( be) ________ a plumber. b. Rewrite the following sentences as directed in brackets (1m): 1/ Ba said “ I am a student now.” →Ba said that ………………………………………………… 2/ " Is Ha Long Bay in the Northern Viet Nam, Phuong?" asked Mary. → Mary asked Phuong …………………………………………
cách bấm xấp xỉ trên máy tính casio như nào ạ
Write a book review ( Harry Potter ) dài 1 tí nha mn 60 điểm đó bỏ uổng lắm
Is there an energy problem? Some people (1)…………. so. Using oil is bad because it makes (2)…………. air. In addition, there might not be much (3)…………. in 30 years. One possible answer is energy (4)……………… wind. How does wind power work? Special machines change wind into electricity. They are called wind (5)………….. .These big, heavy machines can weigh 300 tones and stand (6)…100… meters. Sometimes you can see a large group of turbines in the (7)…countryside….. or near the sea. That is called wind farm. Many wind turbines have three long sticks (8) …………….blades. When the wind moves, the blades turn. When blades turn, they (9)……………. a special stick called a shaft. The shaft turns generators which make electricity. One large turbine can (10)…………enough power for about 300 homes for a year. That number depends on the (11)………….. of the turbine and amount of wind. Not everyone thinks wind turbines (12) …………….good. Turbines make a lot of sound and kill a lot of birds. They also (13)……cost…….. a lot of money. Often, people in a city with a wind farm pay more (14)…………….electricity, not less. There is one serious problem. Wind power cannot (15)…………….other energy, like coal or oil. That is because wind power does not (16)…………… work. When the wind stops, there is no electricity. That means a city needs another (17)…………… to make power. Cities that buy wind power have to purchase another (18)………….. of energy.Wind power seems like a (19)……good……. idea, but today, the cost is high and its benefits are (20)………limited…………...
người ta thường dùng loại hoa nào để trang trí nhà ở
trả lời hộ mình câu hỏi này với nếu đc kẻ luôn bảng nhé mình cần gấp lắm
** Chủ đề thảo luận : KHÔNG ĐỔ RÁC THẢI BỪA BÃI GÂY MẤT VỆ SINH. #Câu hỏi:( Vận dụng chủ đề) a/ Những hành động nào hiện nay đang vi phạm Luật Bảo vệ môi trường(chủ đề)? Hiện nay, nhận thức của người địa phương về vấn đề đó đã đúng như Luật Bảo vệ môi trường quy định chưa? b/ Chính quyền địa phương và nhân dân cần làm gì để thực hiện tốt Luật Bảo vệ môi trường? c/ Những khó khăn trong việc thực hiện Luật Bảo vệ môi trường là gì? Có cách nào khắc phục? d/ Trách nhiệm của mỗi học sinh trong việc thực hiện tốt Luật Bảo vệ môi trường là gì?
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