PHÂN TÍCH ĐA THỨC THÀNH PHÂN TỬ BẰNG PHƯƠNG PHÁP ĐẶT NHÂN TỬ CHUNG DẠNG 1: Tính nhanh. Phân tích biểu thức ra thừa số rồi tính. Bài 1: Tính nhanh a) 85*12.7+5.3*127 b) 52*143-52*39-8*26 c) 15*91.5+150*0.85 d) 37.5*6.5-6.6*7.5+3.5*37.5 DẠNG 2: Tính giá trị biểu thức. Bài 4: Phân tích biểu thức thành phân tử rồi tính giá trị biểu thức. a) x^2+xy+x tại x=77; y=22 b)x*(x-y)+y*(y-x) tại x=53, y=3 c) x*(x-1)-y*(1-y) tại x=2001; y=1999

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II. Rewrite the sentence, using given words 91. One/ disadvantages / living in the countryside / lack / public transport. .............................................................................................. 92. I / always / keep / window / open / order / let / fresh air / in. .............................................................................................. 93. How long / you / leam English? .............................................................................................. 94. Homework / must / be / hand / before / end / the week. .............................................................................................. 95. These exercises / too difficult / students / do / without / mistakes. .............................................................................................. 96. One / my classmates / always / play / computer games. .............................................................................................. 97. Our accommodation / include / ticket price. .............................................................................................. 98. Some / the goods /at the new stores / will be / same / ones / at the small shop. .............................................................................................. 99. People / throw / away / billions / cans / every year. .............................................................................................. 100. The tiger / ask / the farmer / why / strong buffalo / his servant and / he / master. ..............................................................................................

Rewrite following sentences so that the meaning stay the same 1 ''If I were you, I wouldn't buy this car '' -> He advised .................. 2 ''Shall I carr your suicese, Lan '' said Nam -> Nam offered ................ 3 ''Yes, all right, I'll sharre the food with you, Dave'' ->Ann agreed.................. 4 ''Sue, can you remmember to buy some break ?'' -> Paul reminded ................ 5 ''Don't touch anything in this room ,'' the man said to the chilren -> The man ordered................ 6 '' I must go home to make the dinner'', said Mary ->Mary 7 ''Are you going to HCM city next week ?'' Tom asked me ->Tom asked ................ 8 ''Have tyou finished you homework ?'' Mom asked ->Mom asked if 9 She said to me :'' I can't do it by myself '' -> She told me that .............. 10 '' Does your brother live in London, Nam ?'' Lan asked -> Lan wanted to know if .............. 11 ''Don't repeat this mistake again.'' his father warned him -> his father warned him............ 12 '' Give me a smile, '' The photographer said to me -> the.............. 13 '' Don't leave these book on the table '', the librarian said to the students -> the librarian told the students............... 14 '' Have you travelled abroad much ?'' he asked me -> he.................. 15 '' who has written this note?'' the boss asked the secretary -> the boss asked ................. 16 '' I have just received a postcard from my sister, '' my friend said to me -> My friend told me ....................... 17 '' This story happened ago '' he said -> He said .....................