1. Giải các phương trình bậc hai:
a. 2\(x^2\) – 5x + 1 = 0

b. 4\(x^2\)+ 4x + 1 = 0

c. -3\(x^2\) +2x + 8 = 0

d. 5\(x^2\) – 6x – 1 = 0

e. -3\(x^2\) + 14x – 8 = 0

g. -7\(x^2\) + 4x – 3 = 0

giải các phương trình sau a. \(4x^2\) - 12x - 7=0

b. \(x^2-4x+2=0\)

c. \(x^2-2\sqrt{3}x+2=0\)

d. \(\left(x-3\right)\left(x+3\right)+x\left(x+5\right)+6=0\)

e. \(x^2-\left(1+\sqrt{3}\right)x+\sqrt{3}=0\)

Nêu vẻ đẹp của phong cách Hồ Chí Minh trong văn bản phong cách Hồ Chí Minh của Lê Anh Trà

đặc điểm nổi bật ở các dân tộc ít người ở nước ta là gì? tỉ lệ gia tăng dân số của nước ta có xu hướng giảm là do nguyên nhân nào

cho hàm số bậc nhất y = (m + 1)x + m - 1

b) xác định m để đồ thị hàm số đã cho cắt đường thẳng y = 3x - 4 tại 1 điểm trên trục tung

santa claus gives children presents on Christmas Eve ->

Hoa sent a Christmas card to Lan last Christmas

3.Santa Claus gives children presents on Christmas Eve

4.Mary’sparentssenther some money.

5.Each competitor must take a bottle on the river bank

6.Did theybuildthis monument ten years ago?

.7.They delayedthe football match

8.People put many kinds of newspapers on the table

9.Tom must write this essay.

10.My father has just boughta lot of new books

1.People will publish this novel in February

2.They are building a new hotel3.Betty has just sent Mai many postcards

4.Hoa sent her mother a gift

5.They will build many new schools in the future

6.Student smust write the answer in ink

7.He wrote all the songs on this new album

8.They held rice-cooking festival in Thon Trieu last year

9.We must solve this problem soon

10.Nguyen Du wroteTruyen Kieu

1.We must do something for these poor men

2.They have to separate the rice from the husk

3 .He shouldn’t do that silly thing

4.The boy operates that tape-recorder

5.They gave us a post card

6.The student cleaned the room every day

7.I had lost some of my books

8.We believe these boys to become better

9.The scientists found the problem

10.The cat pulls the pan into the sink

1.He gives her a novel about a love story

2.They were painting a house

3.She is watering those flowers

4.We had finished our reports in three months

5.He ought to sell that car

6.We have seen her at the station

7.The librarian will give students the books.

8.He showed me the way to Thames River

9.He was learning in his room at 8.30 yesterday

10.You can buy me an envelope

1.We have just bought a car

2.We have just met Jim

3.They visited the church two years ago

4.Mrs. Green is cooking the food in the kitchen.

5.The doctor examined the patients

6.These boys made that noise

7.I can’t do these exercises quickly

8.She had finished the report by noon

9.The movie has disappointed us very much

10.They have to pay the bill before the first of the month

1.They will ask you several questions.

2.My parents promised me a bicycle two days ago

3.Somebody has locked the box and I can’t open it

.4.Somebody calls the president every morning

5.Airplanes are carrying food to the flood region now.

.6.Nam can repair this sewing machine.

7.People advised us not to go out alone

8.The police ought to put the robbers in prison.

9.They had checked her handbag.

10.Susan’s father has promised her a new watch.

1.You will answer all the questions on the paper

2.The earthquake has destroyed many buildings

.3.He has just killed a tiger

4.Lan’s mother is making her a dress

.5.We saw Mrs. Quyen leave her house at 9 o’clock

.6.Mr. Lam must finish this work before June.

.7.My parents are going to buy a new TV tomorrow

.8.We haven’t seen Peter yet.

9.Nam and Ba are painting the fence.

10.Hoa reads a story book after dinner.

1.They were building a new school here when we came.

2.He will send his parents a gift

3.She has bought two new dresses recently

4.You must write these music lessons in ink

5.We saw our friends outside the church yesterday

6.Lan saw an accident on Le Loi street yesterday

7.People can grow potatoes in this farm

8.I have seen that exciting film many times.

9.My father drinks a cup of tea in the morning

10.Bill called his boss yesterday

1.Susan is phoning her boyfriend in the living room now

.2.Mr. and Mrs. Long were playing chess when we came

.3.His parents have just given him a new dictionary

4.We grow rubber trees in our country

5.He met his father at the front gate

6.People can’t plant rubber trees in the desert