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buithaonhi40
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giải phương trình nghiệm nguyên:x^2-2xy+5y^2=y+1;BÀI NÀY EM ÁP DỤNG PHƯƠNG PHÁP ĐIỀU KIỆN CÓ NGHIỆM CỦA PHƯƠNG TRÌNH BẬC HAI;NHƯNG EM CHƯA ĐƯA ĐƯỢC VỀ DẠNG PHƯƠNG TRÌNH BẬC HAI THEO ẨN X . CÁC VỊ HUYNH ĐÀI GIÚP EM
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III. Rewrite the sentences without changing the meaning. 1.Sweden is colder than Vietnam.-->Vietnam is ..................................................................................... 2.Dalat is quieter than Saigon. -->Saigon is ............................................................................................. 3.The town has many motorbikes. -->There ........................................................................................... 4.Trains are slower than planes. -->Planes are ...................................................................................... 5.The air in the countryside is often cleaner than the air in the city. -->The air in the city is .......... 6.Does your neighborhood have a theatre? -->Is there ....................................................................... 7. English book is 50.000 dong. Vietnamese book is 20.000dong. (cheap) --> Vietnamese book is ............................................................................................................................. 8. The pen is 20.000 dong , the pencil is 12.000 dong. (expensive) -->The CD ................................................................................................................................................... 9. The church 50 years old and the library is 20 years old.(old) --> The church ........................................................................................................................................... 10. Daniel can lift 90 kilos, but Matthew can lift 120 kilos. (strong) --> Matthew ............................................................................................................................................... 11. Lan is 14 years old. Mai is 16 years old. (old) --> Mai ........................................................................................................................................................ 12. Blue ruler is 20 centimeter. Red ruler is 30 centimeter (short) --> Blue ruler is .......................................................................................................................................... 13. The dress is 150.000 dong, the shirt is 200.000 dong. (expensive) --> The ......................................................................................................................................................... IV. Correct order 1.The/on/right/railway station/the/is/. .................................................................................................... 2.You / me / can / the / the / tell / to / beach / way / ? .......................................................................... 3.Straight / on / go / . .................................................................................................................................. 4.Traffic / turn / lights / the / at / right / . ................................................................................................ 5.Go / pass / church / the / . ..................................................................................................................... 6.End / road / go / the / to / of / the / . ................................................................................................... 7.Bus / the / where / stop / is / ? ............................................................................................................. 8.Post / near / the / here / there / a / is / office ? ................................................................................. 9.Oranges / apples / cheaper / are / than / . ........................................................................................ 10.Turning / first / right / take / on / the / your / . ............................................................................... 11.Corner / on / there's / of / cinema / the / a / the / street / . .......................................................... 12.Map / Tan Ky / is / says / nearer / the / house / . ...........................................................................

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