Bài 2:Đường phân giác AD của tam giác ABC chia cạnh BC thành hai đoạn CD=4,5cm và BD=12,5cm.Tính AB,AC nếu chu vi tam giác ABC là 42cm.

Bài 1:Cho tam giác ABC,AD là đường phân giác.

a)Tính độ dài đoạn thẳng BD,nếu AB=8cm,AC=6cm,DC=4,5cm.

b)Tính độ dài đoạn thẳng DC,nếu AB=8cm,AC=6cm,BC=7cm.

b)x=-1/2 👉🏼👈🏻

Mấy bn ơi, giúp mk

Tính giá trị biểu thức:

\(A=\frac{15\times3^{11}+4\times27^4}{9^7}\)

\(B=\frac{\frac{7}{12}+\frac{5}{6}-1}{5-\frac{3}{4}+\frac{1}{3}}\)

Ai đúng mk tích. Cảm ơn các bn

1.(Discuss) for ten minutes,I succeeded in (convince) him that there was no danger.

2.I have no intention of (go) to see film.I couldn't bear (see) my favorite actresses in such a dreadful part.

3.I was just about (leave) the office when the phone rang.

4.Wouldn't it better (ask) Tom (give) his camera at home.

5.We'd better (start) early.We don't want to risk (get) caught in a traffic jam.

6.I look forward (heard) from you.

7.They don't allow (smoke) in the petrol station.

1.(Discuss) for ten minutes,I succeeded in (convince) him that there was no danger.

2.I have no intention of (go) to see film.I couldn't bear (see) my favorite actresses in such a dreadful part.

3.I was just about (leave) the office when the phone rang.

4.Wouldn't it better (ask) Tom (give) his camera at home.

5.We'd better (start) early.We don't want to risk (get) caught in a traffic jam.

6.I look forward (heard) from you.

7.They don't allow (smoke) in the petrol station.