Dùng phương pháp hệ số bất định :

a) 4x⁴ + 4x³ + 5x² + 2x + 1 ;

b) x⁴ - 7x³ + 14x² - 7x + 1 ;

c) x⁴ - 8x + 63 ;

d) (x + 1)⁴ + (x2 + x + 1)².

2. a) x⁸ + 14x⁴ + 1 ;

b) x⁸ + 98x⁴ + 1.

1) Her hair was (life)...........and uncombed

2) It's all working out (beaty)...........

3) Hundreds more people were waiting outside the (jam) ........... stadium

4) The walls need (fresh)...........up with a bit of white paint

5) Your (friend) ........... is very important to me

6) The office was light and (air)...........

7) Some of the (village) ...........Have lived here all their lives

8) The short story is often considered to be a sort of poor (relate)...........to the novel

9) The (real) ........... is that tere is not enough money to pay for this project

1) Some people are obsessive about...........

a.clean b.cleaner c. cleanly d.cleanliness

2) The grey squirrel is now ........... in Britain

a.nature b. natural c.naturalized d.naturally

3) ............., training is talking place in the office rather than outside it.

a.increase b. increasing c.increasingly d.increased

4) Put an ........... in the local paper to sell your car

a.advertise b. advertiser c.advertisement d.advertising

Sửa lỗi sai

1) It's the world's bigest Computer company

2) This room is twice the long of the kitchen

3) We grew up in the same neighbor

4) I have helped my mother in the kitchen since I am 10 years old

5) It has been raining since two hours

6) Lan drinks fewer milk than her

7) She get up late this morning

Chia động từ trong ngoặc

1) They're living in a (neighbor) ...............house.

2) They do a (live)...............trade in sourvenirs and gifts

3) Hoa and Lien used to be next-door ............... (neighborhood)

4) The cream felf (delicious)............... cool on my hot skin.

5) Surface mall is much...............than arimail (cheapp)

6) Nam thinks the food in this restaurant is ............... (taste)

7) It is about 76 kilo in (weigh) ...............

8) The shoes were nice , but they were ...............(comfort)

9) Can you tell me the (culture) ...............differences between the two communities

10)..............., I won;t be able to attend the meeting (differ)

Divide the verbs then fill in the gap with since/ for ( Chia động từ trong ngoặc sau đó điền since/ for vào chỗ trống )

1) He (watch).............television.........three hours.

2) They (be)..............friends..........five months

3) My family (own)..........this farm..........1990.

4) I (buy).........that book..............months ago.

5) I (not see)...............you.............Christmas.

6) We (be).............here...............January.

7) I (not eat) ............... any meat ...............over a year.

8) She (win) ............... the same old dress ............... the beginning of the month.

9) He (leave)...............his home...............five years ago

10) My mother (go) ...............the market to buy foods...............32 hours.