Mọi người có thể giải thích công thức này dùm em ko ạ. Và cho ví dụ tương ứng (-b+- √(D))/2a

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II. Complete the second sentence so that it has the same meaning to the first: 1.It is a contest in which participants have to cook rice. It is a....................................................................................................... (Compound word) 2.It is a festivalin which people have their bulls fight against each other. It is a ........................................................................................................ (Compound word) 3.The United States has a big industry that makescars. The United State has a........................................................................... (Compound word) 4.Viet Nam isa country which exports a lot of rice. Viet Nam is a.........................................................................................(Compound word) 5.This is a machine which is used to wash clothes. This is a...................................................................................................(Compound word) 6.Her school held a contest that students have to design a card at Christmas. Her school helda ................................................................................... (Compound word) 7.Our school held a contest in which students arranged flowers last week. Our school held........................................................................................(Compound word) 8.Millions of people visit the EiffelTower every year. The Eiffel Tower.......................................................................................... ( Passive form) 9.They will take him to Ha Long Bay next month. He ..................................................................................................................... ( Passive form) 10.They have just built a new church near my house. A new church................................................................................................... ( Passive form).