Вычислите  (2√0,5)²

Упростите выражение а) x² √9x²,где x ≥ 0

Раскройте скобки, употребляя глаголы в Present, Past или Future Simple Passive.
1. Bread (to eat) every day. 2. The letter (to re­ceive) yesterday. 3. Nick (to send) to Moscow next week. 4. I (to ask) at the lesson yesterday. 5. I (to give) a very interesting book at the library last Fri­day. 6. Not many houses (to build) in our town every year. 7. This work (to do) tomorrow. 8. This text (to translate) at the last lesson. 9. These trees (to plant) last autumn. 10. A lot of interesting games always (to play) at our PT lessons. 11. This bone (to give) to my dog tomorrow. 12. We (to invite) to a concert last Saturday. 13. Lost time never (to find) again. 14. Rome (not to build) in a day. 15. My question (to answer) two days ago. 16. Hockey (to play) in winter. 17. Mushrooms (to gather) in autumn. 18. Thousands of houses (to destroy) during the Great Fire of London. 19. His new book (to finish) next year. 20. Flowers (to sell) in shops and in the streets. 21. St Petersburg (to found) in1703