-3x^2+12=0 решите уравнение очень срочно)

Помогите записать предложения в passive. Например: They should hold next year's congress in New York. - Next year's congress should be held in New York. 1. You can reserve tickets for the Bolshoi Theatre performances. 2. The actors shouldn't disappoint the audience. 3. People must do away with such bad habits as smoking. 4. You don't have to share this textbook. There are enough copies in the library. 5. You ought to drill grammar rules. 6. You can't make lazy pupils do their homework. 7. You should turn down the radio. I can't talk on the phone. 8. People don't have to weigh their hand luggage at the airport. 9. You must transport the goods at once. 10. Students ought to translate this text and memorize it.

Наименьшее значение степени окисления имеет азот в соединнении:

1)NH4OH

2)NaNO2

3)N2O3

4)HNO3