would you open your mounth, please? 

nga likes watching sports. 

did you see the movie last night? 

Ta có:

( a² + 1) ( b² + 1) ( c² + 1)

= ( a² + ab + bc + ca) ( b² + ab + bc + ca) ( c² + ab + bc + ca)

= [(a + ab) + ( bc + ca)] [(b² + ab) + ( bc + ca)] [( c² + bc) + ( ab + ca)]

= (a + c ) ( a + b) (a + b) (b + c) (c + a) (b + c)

=  [ ( a + b ) ( b + c) ( c + a)]²

Tích cho mình nha

Change the sentences to the passive voice.

1. The girl was arranging the books neatly on the shelves

_______________________________________________

2. The guests were thanking the host for the lovely dinner.

_______________________________________________

3. The reporter was congratulating the winner of the marathon.

_______________________________________________

4. A relief teacher is teaching us how to solve the mathematics problem sum.

_______________________________________________

5. The waiter was recommending the specialities.

_______________________________________________

6. A young girl was plucking the flowers at the park.

_______________________________________________

7. The workers were stacking and counting the books.

_______________________________________________

8. The lifeguard was teaching the students how to do mouth-to-mouth resuscitation.

_______________________________________________

7m3dm8cm = 738 cm

X x 3 + 7270 = 18382

X x 3 = 18382 – 7270

X x 3 = 11112

X = 11112 : 3

X = 3704

Chúc em học tốt

Change the sentences to the passive voice.

1. The mechanic changed the punctured tyre.

___________________________________________

2. Samuel took these pictures of the statue.

___________________________________________

3. The dentist extracted my tooth.

___________________________________________

4. The tiger killed the calf.

___________________________________________

5. Aunt Mary sewed this dress.

___________________________________________

6. The driver steered the car through the obstacles.

___________________________________________

7. My father painted this room.

___________________________________________

8. The gardener pruned the trees.

___________________________________________

Change the sentences to the passive voice

Example: 

1. The boy has delivered the newspapers.

The newspapers have been delivered by the boy. 

 2. The veterinary surgeon has treated the sick animals.

  _______________________________________________

3. The workers have collected the rubbish.

________________________________________________

4. The clouds have covered the sun.

________________________________________________

5. A nurse has looked after me for the past two weeks.

________________________________________________

6. The chef has cooked many award-winning dishes.

________________________________________________ 

7. My brother has broken the dishes.

________________________________________________

8. The maids have done the household chores.

________________________________________________

9. The earthquake has destroyed the town.

 _______________________________________________

10. The teenagers have vandalized the walls

_______________________________________________

19. B.know

20.C.What

đề bài là gì vậy

1230 : 3(x – 20) = 10

3(x – 20) = 123

x – 20 = 41

x = 61