Phương trình  có hai nghiệm , . Khi đó tổng  thuộc đoạn nào sau đây?

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Find a mistake in the four underlined parts of the sentence and correct it:

  The center needs help and donation to take care of the elderly people and sending the

  children to schools and vocational training courses.

• Find a mistake in the four underlined parts of the sentence and correct it:

  A small international team of musician volunteers who organized private concert for the

  children in the National Pediatric Hospital.

• Find a mistake in the four underlined parts of the sentence and correct it:

  Friends are those who will multiply our joys, divide our grief and who honesty is inviolable.

• Find a mistake in the four underlined parts of the sentence and correct it:

  A British newspaper once offered a prize for the best definition of a friend. There were

  thousand of entries. The winning definition is “A friend is the one who comes in when the

  whole world has gone out.”

• Find a mistake in the four underlined parts of the sentence and correct it:

  A friend who support his own friends through emotional difficulties is a true friend.

• Find a mistake in the four underlined parts of the sentence and correct it:

  There are many competitions which having positive effects on competitors.

• Find a mistake in the four underlined parts of the sentence and correct it:

  I am looking forward to see the final of the elocution contest which will be organized at the auditorium.

• Find a mistake in the four underlined parts of the sentence and correct it:

  Population density is the highest in the Red River Delta, 1,136 people per km², and the

  lower in the northwest with only 62 people per km².

• Find a mistake in the four underlined parts of the sentence and correct it:

  Agricultural land per each capita decreased from 0.25 hectares in 1943 to 0.10 ha in 1995.

• Find a mistake in the four underlined parts of the sentence and correct it:

  Rapid population growth, migration, and urbanize in Vietnam have placed new pressure on

  the environment, particularly as a result of forest exploitation, and depletion of water

  resources.