1.They paid me a lot of money to do the job                                                                                                                                                  \(\rightarrow\) I were paid a lot of money to do the job by them                                                                                                                            2.Someone will tell him that nems(chữ"nems"có sai chính tả ko zậy)                                                                                         \(\rightarrow\) He will be told that nems (khi chủ ngữ ko rõ ràng như someone, somebody,... thì ta ko chuyển về sau by)                            3.They have sent enough money to those poor boys                                                                                                                             \(\rightarrow\) Those poor boys have been sent enough money by them                                                                                                            4.The teacher gave each of us two exercise books                                                                                                                                   \(\rightarrow\) Each of we was given two exercise books by the teacher       

câu 3,4 em ko chắc vì mới lớp 6 thui chưa hc sâu chị nhé                                                                                                                   \(\)

x² = y ( y + 1 ) ( y + 2 ) ( y + 3 )

x² = ( y² + 3y ) ( y² + 3y + 2 )

đặt y² + 3y + 1 = a

\(\Rightarrow\)x² = ( a - 1 ) ( a + 1 ) = a² - 1

\(\Rightarrow\)( x - a ) ( a + x ) = -1

từ đó tìm đươc x,y

1. The dinner is being repared in the kitchen by her mother

2. Our teeth should be cleaned tiwce a day

3. Tom's parents will be visited by him next month

4. Was this beautiful drees bought by Mary ?

1. the dinner is being prepared by her mother in the kitchen

2. our teeth should be cleaned by us twice a day

3. Tom's parent will be visited by him next month

4. did this beautiful dress was bought by Mary?

=> This flower is watering by my father every morning

Câu bị động thì gì ạ?

Đặt \(\sqrt{10+2\sqrt{5}}=t\)

\(VT=\sqrt{4+t}+\sqrt{4-t}\)

\(\Leftrightarrow VT^2=4+t+2\sqrt{\left(4+t\right)\left(4-t\right)}+4-t\)

\(=8+2\sqrt{16-t^2}=8+2\sqrt{6-2\sqrt{5}}\)

\(\Rightarrow VT=\sqrt{8+2\sqrt{6-2\sqrt{5}}}\) (không chắc nha)

tth làm chưa triệt để

\(VT=\sqrt{8+2\sqrt{6-2\sqrt{5}}}\)

      \(=\sqrt{8+2\sqrt{\left(\sqrt{5}-1\right)^2}}\)

       \(=\sqrt{8+2\sqrt{5}-2}\)

      \(=\sqrt{\left(\sqrt{5}+1\right)^2}\)

      \(=\sqrt{5}+1\)