Предмет: Алгебра, автор: das280499

решите уравнение методом разложения левых частей на множители
$x^{4} + 3 x^{3} - 12 x^{2} =0$

Ответы

Автор ответа: Матов

$x^4+3x^3-12x^2=0 \ x^2(x^2+3x-12)=0\ \ x=0\ x^2+3x-12=0\ x_{1} = frac{-sqrt{57}-3}{2}\ x_{2}=frac{ sqrt{57}-3}{2}\$

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I am very busy on my weekdays. My working day begins early in the morning. My studies starts at 8 о’clock, so I have to get up at 7 to be ready for it. I never wake up myself, my mother always wakes me up. Sometimes I do my morning exercises, then I rush to the bathroom. I clean my teeth, wash my face. The cold water makes me feel not so sleepy. Then I go back to my room, make the bed. I switch on my radio, put on my clothes, comb my hair, put a little makeup. By that time my breakfast is ready (my mother cooks it for me).

At a quarter to eight I grab my bag and rush to my school/University. Usually I have six or seven lessons a day, it lasts till 3 o’clock. After each lesson there is a break, so I can talk to my friends or eat my sandwich. After classes I go home. First of all, I need to walk my dog. Then I have my dinner and a little rest.

The teachers give us a lot of homework, so I start doing it about 16.30 or 17.00. As a rule, it takes me two or three hours to do my home assignments.
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Twice a week in evenings I play tennis. When I do not go to play tennis, I stay home and watch TV, listen to the music, read magazines. Sometimes my friends call me and we go for a walk. At eleven o’clock, tired after a long working day I go to bed and fall asleep.

Ответить на вопросы и составить рассказ о своем рабочем дне (на английском языке).

1. When do you get up?
2. What do you do after that?
3. Do you do your physical exercises?
4. Who makes your breakfast, you or your mother?
5. Who do you have breakfast with?
6. What do you usually have for breakfast?
7. How do you get to school?
8. How much does it take you to get to school?
9. How long does your school day last?
10. When do you come back home?
11. What do you do in your free time?
12. Who do you go for a walk with?
13. Are you good at sports?
14. What form are you in?
15. What is your favorite subject?
16. Where are you from?
17. When do you go to bed?
18. Do you usually sleep well?

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