Cho x1+x2 =5 , x1.x2=1 . TÍnh /x1/+/x2/

V- Finish the second sentence so that it has the same meaning as the first one:

1- Lan’s brother gave her a story forher birthday.
=>Lan was given a story by her brother in her birthday.

2- It was such a bad news that Mai burst into tears.
=>The news was so bad that Mai burst into tears.
3- If Hong doesn’t study harder, she’ll fail the exam.
=>Unless Hong study harder, she'll fail the exam.
4- I’d like to visit England more than any other country in the world.
=>England is the country that I'd like to visit most.
5- The flight to Ho Chi Minh city lasted one hour and a half.
=>It took one hour and a half to fly to Ho Chi Minh city.
6- The organizers will exhibit the paintings till the end of the month.
=>The paintings will be exhibited till the end of the month.
7- She last wore that dress at her sister’s wedding.
=>She hasn’t worn that dress since her sister’s wedding.
8- Computers are used to design new models.
=>People use computers to design new models.
9- When did you start working in that factory ?
=>How long have you worked in that factory?
10-It isn’t necessary for students to wear uniforms today.
=>Students don't need to wear iniforms today.

A=\(4x^2-4x+3\)

=\(\left(2x\right)^2-2.2.x+1+2\)

=\(\left(2x-1\right)^2\) +2

Vì \(\left(2x-1\right)^2\)\(\ge\)0\(\forall x\)

=>A\(\ge\)2

Dấu"=" xảy ra khi:2x-1=0=>x=1/2

Vậy GTNN của A=2<=>x=1/2

1. He arrived with a friend _who_____ waited outside in the car.

2. The man _whose_____ mobile was ringing did not know what to do.

3. The car _which_____ the robbers escaped in was a BMW.

4. The woman _whose_____ daughter was crying tried to calm her down.

5. The postman _who_____ works in the village is very old.

6. The family _which_____ car was stolen last week is the Smiths.

7. The cowboy _who_____ is wearing a red shirt looks very funny.

8. A bus is a big car _which_____ carries lots of people.

9. The volunteers, _whose_____ enthusiasm was obvious, finished the work quickly.

10. Children _who_____ like music are often good at mathematics.

11. The engineers ___who___ designed the building received an award.

12. The girl _who_____ recited the poem is my niece.

13. The townspeople, _whose_____ pride in their community is well- known, raised enough money to build a new town hall.

14. The Pacific Ocean, _which_____ might have been crossed by raft during the Stone Age, is the world’s largest ocean.

15. The newspaper to _which_____ we subscribe is delivered regularly.

Could I take two weeks' holiday in July?I'd love to take the first two weeks, but if it is not possible, the last two weeks will be OK.Also,can I take three extra days in the first week of December?

1. Tim doesn't play any musical instrumment. ( his father )

His father .doesn't,either........

Neither .does his father............

đ nha bn

When you are traveling long distances by plane, you will feel _____ and it can leave you feeling completely wrecked for several days to a week after you arrive at your destination. A. attentive B. jet- lagged C. hospitable

a,\(x^2+4x+3\)

=\(x^2+3x+x+3\)

=\(x\left(x+3\right)+\left(x+3\right)\)

=(x+3)(x+1)

b,\(2x^2+3x-5\)

=\(2x^2+5x-2x-5\)

=x(2x+5)-(2x+5)

=(2x+5)(x-1)

c,\(16x-5x^2-3\)

=\(-\left(5x^2-16x+3\right)\)

=\(-\left(5x^2-x-15x+3\right)\)

=-[x(5x-1)-3(5x-1)]

=-[(5x-1)(x-3)]

=-(5x-1)(x-3)

\(x^2+2xy+y^2-25\)

<=>\(\left(x+y\right)^2-25\)

<=>\(\left(x+y\right)^2-5^2\)

<=>(x+y+5)(x+y-5)