Существует несколько разложения: Вынесение общего множителя за скобки группировки С формул сокращенного умножения
Сначала убедимся в том, что разложение на множители – вещь полезная. Вам предлагают решить уравнение 2х^2 + х – 6=0. Для таких уравнений имеется специальное правило решения, но вы его пока еще не знаете. Как быть? Воспользуемся разложением многочлена на множители: 2х^2 + х – 6=(2х – 3)(х + 2) Тогда заданное уравнение можно переписать в виде: (2х – 3) (х + 2)=0 Произведение равно нулю, если один из множителей равен нулю. Значит, либо 2х – 3 = 0, либо х + 2 = 0. Из первого уравнения х=1,5, а из второго уравнения х = -2 . Уравнение решено, оно имеет два корня: –2 и 1,5.
Anna: Hello, is that you, Mary? How are you? Why yesterday did not go to class? Mary: Hi Anna. I felt bad. And couldn't even get up. A: What happened to you? M: I don't know. I haven't went to the doctor. I had a high temperature. A: can you go to institute today? M: I'm Afraid not. This morning I visit the doctor. I feel that I have a few days to stay in bed. Really sorry we have to miss lectures. A: Nothing to worry about. Don't have to come if you don't feel. Of course, you need to stay in bed. If you want to borrow my notes. Can I visit you today? M: Of Course. Come immediately after lessons. A: I'm Sorry, but after school I have to go to the library to get some books for discussion. M: don't go to the library. I have many interesting books. You can take any of them. A: Well. I can come to you on the 41 tram? M: Yes. But don't come on the tram. Near my house opened a new metro station and takes me all of fifteen minutes to reach the Institute by metro. A: Very well, but I have to go to College. Yet. M: see you Then. Don't forget to bring me your notes. Give me a call if you can't come.
