Gọi  z 1 ,   z 2 là hai nghiệm phức của phương trình z 2 - 2 z + 3 = 0 . Tính | z 1 |+| z 2 |.

A. 2 2 .

B. 3.

C. 2 3 .

D. 2.

Gần giống BFF của mk...

Read the passage and complete the statements below:

Her name is Lan. She lives in a house in the city. Near her house, there is a supermarket, a bank, a post office and a clinic. She is a student. She studies at Le Quy Don School. Her house is far from her school so she often goes to school by bike. She goes to school in the afternoon. There is a park in front of the school. There are a lot of trees and flowers in the park. Behind the school, there is a river.

Near her house, there is …………………

54.(53-81)+53.(81-54)

=54.53-54.81+53.81-53.54

=53.81-54.81

=-81

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