Phân tích đa thức thành n tử:

a) x⁴ + x³ + x + 1                               e) ax² + ay - bx² - by

b) x⁴ - x³ x + 1                                     f)

c) x²y + xy² - x - y

d) ax² + ay - bx² - by

Phân tích đa thức thành n tử:

a) 3x(x + 1)² - 5x² (x + 1) + 7(x + 1)

b) (2x + 1)² - (x - 1)²

c) 9(x + 5)² - (x - 7)²

d) 25(x - y)² - 16(x + y)²

Phân tích đa thức thành n tử:

a) x³ - 6x²y + 12xy² + 8y³

b)125x³ + y⁶

c) 0,125(a + 1)³ - 1

Số nguyên tử phân tử các chất : Helpp

0,1 mol O₂

0,5 mol P

0,3 mol C₁₂H₂₂O₁₁

a mol Hcl

Số nguyên tử phân tử các chất :

0,1 mol O₂

0,5 mol P

0,3 mol C₁₂H₂₂O₁₁

a mol Hcl

Tìm x: Helpp

a) (x + 3) (x² - 3x + 5) = x² + 3x       

b) x⁴ - 9x² = 4x² - 36

a) (x + 3) (x² - 3x + 5) = x² + 3x        Tìm x:

b) x⁴ - 9x² = 4x² - 36

III. Choose the best answer. Help

 3. The Gong Festivals is held ____________ in the Central Highlands.

      A. year                    B. yearly                       C. annual                     D. annually

 4.Teenagers enjoy listening to music and____________ out with friends.

      A. hang                     B. to hang                   C. hanging                     D. hangs

5. There are a lot of __________ at Mid-Autumn Festival.

     A. lanterns     B. offerings      C. worships     D. archways

6. We like Flower Festival in Da Lat __________ it’s joyful.

     A. although     B. however    C. because     D. therefore

7. Hung King Temple is the place where all Hung Emperors are__________.

    A. worship     B. worshipped     C. worshipping    D. to worship

8. You should listen to __________ court music when going on a cruise in Huong river.

   A. national     B. royal      C. principal     D. animal

9. Nick want to take part __________ the dragon boat race.

    A. on     B. in        C. at     D. for

      VI. Choose the word or phrase among A, B, C or D that best fits the blank space in the following passage

    Kate Festival is (1)                          by the Cham people for 3 days at the beginning of October. This event is held in a large space in the three Champa Towers (Po Nagar, Po Klong Garai and Po Rome). The main purpose of the festival is to (2) their heroes like Po Klong Garai and Po Rome. (3)   , the festival is a chance for the local people to relax, to meet and wish one another fortune in the future.

    This is one of the biggest and most important events of the Cham people in Vietnam. (4)_____  , it is a good opportunity for the visitors to explore the charm in the Cham culture, from architecture to costumes, instruments and traditional songs that are used to praise their kings in the past. The Kate festival in each tower starts at the same time on the same day, and the day after, villages and families begin to hold their own rites. During the rite, the people call their ancestors and gods with the help of a shaman, and then pray (5)    ____health and prosperity. The actual festivals (6)________            after the rites. It is a combination of traditional music and dance, including some activities like performances of Ginang Drum and Saranai Flute or the traditional dance of Cham girls.

        1. A. organize          B. being held              C. held                D. hold

        2. A. see                   B. commemorate       C. watch             D. love

        3. A. However         B. Nevertheless         C. Moreover        D. Therefore

        4. A. Therefore        B. However               C. Because          D. Although

        5. A. to                     B. about                     C. for                   D. of

        6. A. take the place   B. take places           C. take part          D. take place

III. Choose the best answer.

 3. The Gong Festivals is held ____________ in the Central Highlands.

      A. year                    B. yearly                       C. annual                     D. annually

 4.Teenagers enjoy listening to music and____________ out with friends.

      A. hang                     B. to hang                   C. hanging                     D. hangs

5. There are a lot of __________ at Mid-Autumn Festival.

     A. lanterns     B. offerings      C. worships     D. archways

6. We like Flower Festival in Da Lat __________ it’s joyful.

     A. although     B. however    C. because     D. therefore

7. Hung King Temple is the place where all Hung Emperors are__________.

    A. worship     B. worshipped     C. worshipping    D. to worship

8. You should listen to __________ court music when going on a cruise in Huong river.

   A. national     B. royal      C. principal     D. animal

9. Nick want to take part __________ the dragon boat race.

    A. on     B. in        C. at     D. for