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Tìm x: a.(x + 3)2-(x -4)( x + 8) = 1 c.x^3+ 6x^2+12x + 35 = 0
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I. PRESENT SIMPLE 1. People speak English all over the world.  English is speaking all over the world by people 2. We grow rice in tropical countries.  Rice 3. We often decorate our house before New Year’s Day.  Our house 4. We expect students not to talk during the class.  Students 5. Every day we throw away millions of kilos of waste paper.  Millions of kilos of waste paper II. PAST SIMPLE 1. People made this shirt in Hong Kong.  This shirt 2. I phoned my father to pick me up this morning.  My father 3. People built a new supermarket here two months ago.  A new supermarket 4. Somebody saw the unidentified flying objects in the sky last night.  The unidentified flying objects 5. They didn’t answer two difficult questions yesterday.  Two difficult questions PRESENT PERFECT 1. We have finished all the assignments already.  All the assignments 2. They have just introduced a new style of jeans in the USA.  A new style of jeans 3. No one has taken him to the theater.  He 4. The television has broadcast all the 23rd Sea Games competitions.  All the 23rd Sea Games competitions 5. The government has increased gasoline price by 15%.  Gasoline price III. MODAL VERBS 1. My father can buy a new house next year.  A new house could be buy next year by my father 2. I couldn’t open the door of the room this morning.  The door of the room 3. The students in my class may elect David their monitor.  David 4. The athletes might visit some interesting places after Sea Games.  Some interesting places 5. They will complete the high way from north to south next year.  The high way from north to south

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