720 ЭТО 3 В КАКОЙ СТЕПЕНИ

Ребята помогите срочно!!!

Какое число нужно прибавить к выражению x(8x-6)^2 + (12x-1)^2 чтобы полученное выражение было равно кубу двучлена?

Раскройте скобки, употребляя глагол в нужном времени. 1. Her brother said he never (to see) that film before. 2. He came home and listened: his son (to play) the piano. 3. They didn't worry too much because they (to lock) the door. 4. I asked her when she (to give) me that book to read. 5. We wanted to know if they (to enjoy) the meal. 6. She supposed she (to like) the hotel. 7. I am afraid they (not to come) yet. 8. He wanted to know if the station (to be) far away. 9. Eric doesn't know who (to phone) him at five o'clock. 10. He admitted he (not to be) here for weeks. 11. She was sorry she (to arrive) so late. 12. Jean promised she never (to speak) to me again. 13. Andy said he just (to buy) a new car. 14. My mother decided that she never (to drink) coffee late at night. 15. I hear you already (to find) a new job. 16. We were sure our children (to sleep). 17. I didn't think they still (to discuss) that problem. 18. It is remarkable that you (to come) at last. 19. My doctor thinks I (to be) allergic to pineapples. 20. Sophia knew her aunt (to be) glad to visit her in two days.

вычислите количество атомов углерода содержащегося в глюкозе массой 9 г

ПОМОГИТЕ РЕШИТЬ: корень из 2-x^2 * (2x^2-5x+3)=0