Розв’яжіть рівняння:

а) (2х – 3)2 – 3 = (2х + 1)2 – 11;

б) 16у2 – (4у – 3)2 = 15у – 90. Пожалуйста

Помогите до вечера 28.05.13 сделать!!!

Пожалуйста помогите люди добрые)))

 А потом уже мне оценка 2 или 4 смотря кто поможет.

I.Поставьте предложения в вопросительную и отрицательную форму:

1.They have received a new flast  this year.

2.The boy has passed all his exams successfully.

3.The teachers have already heard the news about this student.

4.The childrien have know his father.

5.He had worker at a plant before the army.

6.We had studied German before we began to study English.

7.She had written the letter by 5 o'clock.

8.The children will have done their homework before their parents come home.

9.It will have stopped raining by noon.

II.Преобразуйте предложения употребив Present Perfect.

1.Clean the room

2.Do your hair.

3.Have a good rest.

4.Pack your things.

6.Close the door.

III.Преобразуйте предложения. употребив the Past и the Perfect.

1.Alex has been to Kiev only one time this year.

2.He has just finished his report.

3.They have written a test-paper today.

4.Pete has gone to Minsk.

5They have seen this monument.

до рассвета далеко(1) и над спящим лесом плывет прозрачная ночная тишина(2) и (3) когда привыкнешь к ней (4) явственно начинает слышаться каждый шорох и шепот
расставьте запятые