Giải phương trình : (x-1)(2x+7)(x² + 2)=0

cho tam giác ABC, đường trung tuyến AM. gọi D là trung tuyến của AM, E là giao điểm củ BD,AC. CMR DE=1/4BE

Cho tứ giác ABCD có AB=BC=AD và góc A + góc C = 180⁰ . Chứng minh : BD là phân giác góc D

Cho hình thang cân ABCD có AB//CD , \(\widehat{D}=60^0,AB=AD\) . BD là phân giác góc D . Chứng minh DC=2AB

Complete the sentences, using a relative pronoun

1. The young man is talking to our teacher. He is Ba's brother

=>The young man who is Ba's brother is talking to our teacher .

2. We visited the monument. It was built a hundred years ago

=>We visited the monument which was built a hundred years ago

3. The boys are interested in football. It is a popular game over the world

=> The boys are intered in footbal which is a popular game over the world .

4. The boy gave his parents big hugs before he left. He went abroad to study

=> The boy who went abroad to study gave his parents big hugs before he left

5. My friends had so much fun at the festival. They wanted to go there again

=>

6. Children like to eat ice cream. It can cause toothache

=>Children like to eat ice cream which can cause toothache