đề thế này mới đúng so sánh A=  (2+1)(2²+1)(2⁴+1)(2⁸+1) và B= {[(2²)²]²}²

 A=  (2+1)(2²+1)(2⁴+1)(2⁸+1) 

=(2-1)(2+1)(2²+1)(2⁴+1)(2⁸+1)

=(2²-1)(2²+1)(2⁴+1)(2⁸+1)

=(2⁴-1)(2⁴+1)(2⁸+1)

=(2⁸-1)(2⁸+1)

=2¹⁶-1

B= {[(2²)²]²}²

=2¹⁶

=>A<B

Her name is Lan.She is thirty years old.She is a teacher.She teaches English at a secondary school.She has long black hair.She is tall and thin.She has round bright eyes.Her nose is straight.Her teeth are white.She is very lovely.

Nhớ tick mk nha!Đảm bảo đúng!!!

Đổi các câu sau sang dạng số nhiều:

1, Her chair is old.

->Her chairs are old.

2, What color is this flower ?

->What colors are these flowers?

3, There is a garden behind the house.

->There are gardens behind the house.

4, Is your pen new or old ?

->Are your pens now or old?

5, what's that ? it's an eraser.

->What are those?They are erasers.

Nhớ tick mk nha!~~

SBC  |---|---|---|-|

SC    |---|

tổng số phần bằng nhau là 

3+1=4 (phần)

số chia là

(76-2-2):4=18

số bị chia là

18x3+2=56

ĐS

Nhớ tick nha!~~

II. Make question and answers:
1. Do you go to bed at 10? - Yes, I do.
2. What time does Lan have Physics class? - She has it at 8:40 .
3. What time is it now? - It’s 10:45.
4.What classes do you have on Thursday?- I (We) have Science, Math and History.

1. The canoe overturned and everyone fell into the deep water.
2 Can I help you with your bag, Mrs.Hoa?
3.Do you mind if I sit in the front seat of the car.

4.My mother wanted me to look after my little sister when she was out.

5.I'd rather you not put off your shoes.

6.His car has broken down again.

7. I can't make up my mind what to do now.

Nhớ tick nha!~~

(x^3-3x^2.2+3x.2^2-2^3)-2x-2=(1^3-3.1^2x+3.1.x^2-x^3)-5x^2-10x

x^3-6x^2+12x-8-2x-2=1-3x+3x^2-x^3-5x^2-10x

chuyển vế,ta được:

2x^3+4x^2+23x-11=0

phần này dễ, ban tự giải và **** cho mk nha!!!!!!!!!!!!!

1.Tom often plays soccer in the fall but he sometimes goes sailing.

2.She lives in a house with beautiful flowers in the garden in front of it.

3.How much beef do you want?

4.I don't want to eat anything because I'm not hungry.

4.Thuy is not going to visit her grandparents next summer vacation but she is going to visit her friend in London.

Nhớ tick nha!!!Đảm bảo đúng!!!!