Chủ đề:
Bài 1: Căn bậc haiCâu hỏi:
\(\frac{2\sqrt{x}}{\sqrt{x}-3}-\frac{11\sqrt{x}-3}{9-x}+\frac{\sqrt{x}+1}{\sqrt{x}-3}\)
Rút gọn
1.Each of the following sentences contains a mistake . Underline it and write the correct answer in the space provided.
a. I will chat with my friend in New York on Skype at this time next Saturday
b. Peter refused working online because he prefers meeting face-to-face
c. We are still using landline phones to communicate with each other in 10 years
d. She denied sign up for another account to post comments on my Facebook wall
e. Members of the project are going to have a F2F group discussion in five days'time