$x^5+1$
$=x^5+x^4−x^4-x^3+x^3+x^2−x^2-x+x+1$
$=x^4(x+1)-x^3(x+1)+x^2(x+1)-x(x+1)+(x+1)$
$=(x+1)(x^4-x^3+x^2-x+1)$
`x^5+1`
`=x^5-x^4+x^4-x^3+x^3+x^2-x^2+x-x+1`
`=(x^5+x^4)-(x^4+x^3)+(x^3+x^2)-(x^2+x)+(x+1)`
`=x^4(x+1)-x^3(x+1)+x^2(x+1)-x(x+1)+(x+1)`
`=(x+1)(x^4-x^3+x^2-x+1)`
ai rãnh làm giúp em câu F thôi ạ, em cảm mơn rất nhiều, 5 sao nha
Mọi người giúp mk với ạ còn có 5 ohuts
1. Our most serious problem nowadays is the ………… pollution. ENVIRONMENT 2. Would you like to go to the English ………….. contest with me? SPEAK 3. He's quite an……… person. He plays lots of sport and goes running everyday energy 4. You had better do some ………………….. for the final exams REVISE 5. Bell ……………… demonstrated his invention at countless exhibitions. SUCCESS 6. Rubber is elastic so we can . . . . . . . . . . . . . . . this string. LONG 7. Don’t let the child go out because it’s……………. WIND 8. Nha Trang is a wonderful ………..... resort in Viet Nam. SEA 9. We were pleased to see Jim ……………. his dream in the end. REAL 10. The remote desert area is ………………. only by helicopter. ACCESS
1. This cake is made …………………… flour, eggs, milk, salt and butter. 2. I find it difficult to translate this passage ………………….. English. 3. Are you getting ………………… well with the new boss? 4. She has gone on holiday ………………… a fortnight. 5. At the moment my father is reading a novel ……………….. Jack London. 6. should work harder ……………………… his English pronunciation. 7. Try to calm ………………. And tell us exactly what has happened. 8. Thank you very much for the flowers. They really helped to cheer me …………….. . 9. At Boston University, Bell experimented with ways of transmitting speech ………….a long distance. 10. Life in the provinces is changing ………… the better.
IV. Find the mistakes in the following sentence and correct them. 1. Let’s going somewhere for a coffee after this wonderful meeting. 2. I asked Lan to send the parcel and she said she would send it next day. 3. Lucky, the weather was very fine and we had a pleasant picnic. 4. Sapa is one of the most favourite mountainous attractions tourist in Vietnam. 5. Nobody have cleaned the room for ages so it looks so dirty and damp. 6. They asked me what did happen last night, but I was unable to tell them. 7. Mr. Tuan works from seven in the morning till five hour in the afternoon
CAli hộ mk chữ nguyễn nghĩa mỹ duyên (mọi người ơi ai có nhóm cho mình vào với)
tìm m để phương trình sau có nghiệm: a, x² -3x+m+1=0 có nghiệm thuộc [-3;4)
Giải hộ mình 2 bài này với cần gấp
Điền dạng từ đúng trong ngoặc 1. Fiona was ___________(interested) in their garden than in their house. 2. It's certainly _______(hot) today than it was yesterday. 3. Staying in a hotel when you go on holiday is _ ________ (comfortable) than camping. 4. Jessica is ______ (talented) than Anna at painting. That’s why Anna is so jealous with her. 5. Walking is __________ (easy) than high lumping.
bài 2 hơi khó với mình bày giusp mình với
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