Kết quả tìm kiếm

tìm max A=-2x^{2}+3x+1 B=-5x^{2}-x-3

tìm min A= (x+1)(x-2)+5 B=x^{2}+3y^{2}-x+2y+5 C=2x^{2}-7x+5 D=x^{2}-4xy+5y^{2}-3y+1 E=x^{2}+2y^{2}-2xy-2x+4y+5

A=2x-5x+7 B=x^{2}+2y^{2}-2xy-4x+6y+5

a)x^{2}- x=0 b)x^{2}-4x-5=0 c)x^{2}+2y^{2}-4x+12y+22=0

bài 198 nha

hình 1 và hình 2 là một bài các bạn nhé hình 3 và hình 4 là một bài đề bài hình 3 và hình 4 complete the sentences using the words in bold. use two to five words

cho tam giác ABC có M,N,P thứ tự là trung điểm của AB,AC,BC a) CM các tứ giác BMNP,AMPN,MNCP là hình bình hành b) trên tia đối của tia PN lấy K sao cho P là trung điểm của NK CM tứ giác ANKB, tứ giác BNCK là hình bình hành

8 Make one sentence from each group of sentences, beginning as shown. 1 I got on a train. I wanted to go to a station. The train didn’t stop there. The train I..got on didn't stop at the station I wanted to go to...................... 2 I read a book. You recommended a book to me. This was...

6 Make one sentence from each group of sentences, beginning as shown. 1 The hotel was full of guests. The hotel was miles from anywhere. The guests had gone there to admire the scenery. The hotel, which...was miles from anywhere was full of guests who had gone there to admire the...

7 Make one new sentence from each pair of sentences. Begin as shown, and use the word given in capitals. 1 Brenda is a friend. I went on holiday with her. Brenda is ...the friend who I went on holiday................................. WHO 2 This is Mr Smith. His son Bill plays in our team...

5 Put a suitable relative pronoun in each space, or leave the space blank where possible. 1 My bike, ...which............ I had left at the gate, had disappeared. 2 The shoes............................ I bought were the ones................................... I tried on first. 3 The bag...

3 Underline the most suitable word in each sentence. 1 My friend Jack, that / who / whose parents live in Glasgow, invited me to spend Christmas in Scotland. 2 Here’s the computer program that / whom / whose I told you about. 3 I don’t believe the story that / who / whom she told us. 4...

2 Replace the relative pronouns in italics with that, where possible. 1 This is the magazine which I told you about. ...This is the magazine that I tild you about............................. 2 John’s flat, which is in the same block as mine, is much larger. 3 The girl whose bag I...

1 Underline any relative pronouns that can be left out in these sentences. 1 I think that my boss is the person who I admire most. 2 Harry, who was tired, went to bed very early. 3 Were taking the train that leaves at 6.00. 4 Have you seen the book that I left here on the desk? 5 The film...

Put the verbs in brackets into the correct tenses. chỉ ra các dấu hiệu nhận biết 1 If you (find) a skeleton in the cellar, don't mention it to anyone. 2 If you pass your examination, we (have) a celebration. 3 What (happen) if I press this button? 4 I should have voted for her if...

1 tìm max A=5+4x-x2 B=6x-x2+15 C=1-2x-2x2 D=x-x2 E=1-2x-x2 2 tìm min A=x2-10x+5 B=9x2+12x+1 C=25x2-20x+3 D=2x2-4x+1 E=2x2-3x+5 G=2x2-2x+1 F=x2-5x+1 M=3x2-3x+1 N=3x2-5x Q=x2+y2-4x+6y+15

Put the following into indirect speech. 7 'We have moved into our new flat. We don't like it nearly so much as our last one,' said my aunt. 14 'If you let the iron get too hot you will scorch your clothes,' I warned her. 15 'You haven't given me quite enough. The bill is for £14 and you've paid...