получается делаем так:
сначала решаем уравнение как и обычно т.е. теоремой виетта или дискриминантом
х^2-4х+3=0
я решу теоремой виетта:
сумма корней равна 4
произведение 3
значит корни 1 и 3
далее:
есть такая формула разложение на множетели квадратного уравнения выглядит так: a(x-x1)(x-x2), где а-множетель перед квадратом в нашем случае это 1, х1 и х2 - корни.
подставим в неё наши корни, получим (x-1)(x-3)=0
так а теперь решим это неравенство (x-1)(x-3)> 0
методом интегралов ( тут 3 промежутка от минус бесконечности до 1 от 1 до 3 и от 3 до плюс бесконечности):
допустим х =0, подставим (0-1)(0-3)=3 знак + значит в промежутке от минус бесконечности до 1 знак +
от 1 до 3 знак -
от 3 до плюс бесконечности +
ответ: х принадлежит промежутку от минус бесконечности до 1 и от 3 до плюс бесконечности
1.Yes they are. They use polite words.
2.The British are reserved. They don't like displaying their emotions even in dangerous and tragic situations.
3.Englishmen are conservative, they love familiar things.
4. There are a lot of traditional ceremonies such as the "Changing of the Guard" at Buckingham Palace, "Trooping the Colour", which is performed on the Queen's official birthday, or the "Ceremony of the Keys", that takes place every night at the Tower of London.
5. Traditional British dishes are porridge, pudding, toasts. They like to drink tea.
6.Yes, they do. For example, Everything is orderly: the lawns and the trees are neatly trimmed.
7.Yes they do.Englishman is said to be a countryman at heart. The Eng¬lish countryside is many things to many people. It means peace and quiet, beauty, good health and no crime. Most Englishmen love gardens.
8The British love animals very much.
9.The British are polite, conservative and reserved.
10Irespect the British, because they keep their traditions and love their country.
11The Russians are not so reserved and don;t drink much tea.
