Номер 260 7 и 8 пример

1 Bread is sold in this shop.Bread isn`t sold in this shop.Is bread sold in this shop?2 My books are kept on the shelf.My books aren`t kept on the shelf.Are my books kept on the shelf?3 The apple-tree is planted by me.The apple-tree isn`t planted by me.Is the apple-tree planted by me?4 Films are watched by many people.Films aren`t watched by many people.Are films watched by many people?

-3x2-3/xx(16x2-9)b+1/9b2-1