Tính giá trị nhỏ nhất của biểu thức A (x>0)

A=x3-3x2+4+2016x

rewrite each pair of sentences as one sentence using relative pronouns in brackets
1 the first boy has just moved . he knows the truth (who)
__
2  i don't remember the man . you said you met him at the canteen last week (whow)
__
3 she left here without saying goodbye . this made me sad . (which)
__
4 the children often go swimming  on Sundays .they have much free time then. (when)
__
5 they are looking for the man and his dog .they have lost the way in the forest .(that )
__
6  that tree has lovery flowers . it stands near the gate of my house (which)
__
7 my wife wants you to come to dinner . you were speaking to my wife (whow) 
__
8 idon't like the man . he is going out with my sister (that)
__
9 charlie chaplin became a very rich man . he was from apoor family. (who)
__
10 that bike was too expensive . he wanted to buy it (which)
__

fill in the blank with a suitable relative pronoun/adverb.
1 let me see the letter __ you have written
2 is there anyone __ can have me do this ?
3 Mr.brown,__ in only 34 is the director of this company 
4 i know a plane __ roses grow in abundance
5 it was the nurse __ told me to come in
6 the teacher with __ we studied last year no longer teaches in our school

supply the correct form of the words in brackets
1 we find this method very __ ( effect)
2 i turned the light off when leaving home to save __ (electric)
3 energy __ includes searching for alternative fules (conserve)
4 energy-saving bulbs help  __ save money .(consume)
5 my little sister needs only one more stamp to computer her __ (collect)
6 __ friendly energy sources include water and wind power (environment)
7 many household __ are expensive (apply)
8 we were all impressed by the speed and __ of the new system (effcient)
9 many newer cars have a much lower fuel __ (consume)
10 it is said that the system words __ (effect)

supply the correct form of the words in brackets

1 people who do exercise __ are less likely to suffer from stress (regular)
2 we must learn how to keep the environment __(pollute)
3 i am __ that many people have spoiled this area (disappoint)
4 electricity ,gas and water are __ in Western countries.(need)
5 there has been a __ in unempolyment recently (reduce)

rewrite the sentence using the words in brackets so that the second sentence has the same meaning .

1 i don't want to go out tonight (feel)
=> I __
2 Is it OK if i open the window,Miss Jackson?(may)
=> Miss Jackson,__?
3 I told him he should speak to his mother (ouch)
=> I __
4 I would prefer to stay at home tonight (rather)
=> I__
5 how much do these leather shoes cost ? (price)
=>What __
6 can you take care of mary on Saturday evening for us?(look)
=>can__
7 who does this pen belong to ? (whose)
=> Do you know __?
8 although it was raining , we went camping (spite)
=>in __
9 the picnic was cancell due to the rian (because of)
=> the picnic __

rewrite the sentence, using the words in brackets so that the second sentence has the same meaning .

1 Our teachers never let us leave the school. (allowed)
=> We were not __
2 Please don't smoke in this room (rather)
=>I'd __
3 My car keys are possibly in the kitchen (might)
=> My car keys __
4 Is it a problem if I open the window a little ? (mind)
=>__?
5 The docter told me to give up smoking.(stop)
=>The docter told __
6 this is the most boring film i have ever seenl (move)
=> i have __ !
7 I told them not to cross the park at night .(warned)
=>I __
8 What do you advise me to do now ? (I)
=>What __ ?
9 i play tennis every Wednesday .(a)
=> I __ 
10 all of the people in this room are french .(is)
=> in this room, __

Rewrite the sentences, using the words in brackets so that the second sentence has the same meaning.

1 we paid some people to landscape the garden for us last year (had)
 => we __
 2 the Queen is opening the new school .(opened)
=> the new school__
3  mark started learning  french two years ago.(learned)
=>mark has__
4 look at those black clouds!  There is rain arriving (going)
=>look at those black clouds! it __
5 the teenagers were stealing my car when i arriving (being)
=> My car __
6 i regret not speaking to Ms.Hoa sooner (had)
=> I wish __
7 yesterday  , they cut down two old trees in the local park . (were)
 => yesterday , two__
8 I walked quietly because I didn't want to wake the baby . (so as)
=> I walked quietly__
9 do you know how many letter are delivered by the post office every year (delivers)
=>do you know how many __
10 We should leave here now (left)
=>It's__