Câu 1 : Cho tam giác ABC vuông tại A, trung tuyến AM. Gọi D là trung điểm của AB, M' là điểm  đối xứng với M qua D.

a. Tứ giác AMBM', AMCM' là hình gì? Vì sao?

b. Kẻ MH vuông góc với AC ( H ϵ AC). Tính diện tích tứ giác ADMH, biết AB=6cm, BC=10cm

Câu 2. 

Rút gọn biểu thức \(A=\dfrac{14x^3y\left(x-y\right)^2}{21x^2y^2\left(y-x\right)^3}\)(x≠0; y≠0; x≠y)

Câu 3. Phân tích đa thức thành nhân tử

a) 2x³y - 18xy³                                                      b) x³ - 4x² - 9x + 36

Câu 4. Tìm x biết

a) x³ - 16x = 0                                                   b) (x - 2)²  + (x - 3) (x - 2) = 0

giúp mình với mn:(((

Bai1.Viết lại câu sao cho nghĩa không đổi

1. I am too hungry to do my work properly

=> if i weren't

2. Perhaps i went on holiday in HCM city and visit the theme park there

=> if i went

3.My dreamm is to become rich and travel around the world

=> if i were

4. Supposing you were a billionaire, what would you do

=> what

5.Why don't you ask for her help?.That's what i'd do

=> If i

6.imagine you live in Mars. How would you feel?

=>How

7. you should invest in that company. That'a what i'd do

=> if i

8.You'd better live in the countryside

=> if i

Bai 2.

1.You should speak to Peter...manages the sales department

(who/whose/whom)

2. he arrived late for the meeting,... was a stupid thing to do

(that/who/which)

3. Mr.Smith,... wife works for us, can provide more details

(who/which/whose)

4. it is not good for your health to live in a city... the population is too big

(who/which/where)

5.the young man...is standing on the corner works for an overseas company

(whose/who/which)

6.the employees ... were hired last month helped improve profits

( that/whose/which)

7. that is the shop... i often go to buy fresh meat

(which/where/whose)

Bai 3: choose the correct pronouns among who, which, whose,whom to complete these sentences

1. I talked to the women... husband was kind a doctor

2. Mr.Richards,... is an engineer, is our neighbour

3. we often visit our uncle in North star... is in East Anglia

4. this is the girl... we like best

5. that is Jonh, the boy... we picked up at the airport

6 Thank you very much for your assistances... helped me overcome it

7 The man, ...father is the president of a big group, is very rich

8. the children, .... shouted in the street, are not from our school

9. the car, ... driver is a youngman, hass collided with a train

10.what did you do with the money.... your best friend lent you

Chế độ chính trị 2 đảng của Mĩ có điểm gì giống với chế độ 2 đảng của Anh? Liên hệ chế độ Mỹ hiện nay

giúp mình với chiều mình nộp rồi!!!