Cho phương trình 14x2−m−3x+m2−2m+7=0 .Tìm để phương trình có hai nghiệm phân biệt.

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the word that has the underlined part pronounced differently from the rest:  

   laugh           through           eighth           lightning

   

• Choose the best answer for the following sentence:

  They are the only two British students in our class so they tend to _____________________  together.

   

• Choose the best answer for the following sentence:

  If you go on like this, you will end _____________________________ in prison.

   

• Choose the best answer for the following sentence:

  I will never forget ________________________ classmate of mine, Peter Jones, who shared _____________________ same class with me for three years.

• Choose the best answer for the following sentence:

  There are two public libraries in the city, but _____________ of them is located close to the place where I live.

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

  I am attending evening classes of philosophy and fine art.

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

  Apart from a few scratches, the chairs were in perfect conditions. 

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

  The piece of wood was not enough thick. 

• Choose the word that has the underlined part pronounced differently from the rest: 

  beat                  climb                      debt                       doubt

• Choose the word that has the underlined part pronounced differently from the rest: 

  butter                 put                    sugar                        push