Помогите, пожалуйста, решить уравнения: (1+i)*z=1; z^2+4z+5=0 - №23988737

Помогите, пожалуйста, решить уравнения: (1+i)*z=1; z^2+4z+5=0
- Предмет:
  Алгебра
- Автор:
  girl85
- 6 лет назад

Ответы 1

$z^{2} +4z+5=0; z_{1}=-1; z_{2} =-4; (1+i)z=1;$ $(1+i)*(-1)=1; -1-i = 1; i = 2; (1+i)*(-4) =1;$ $-4 - 4i =1; -4i = 5; i = - \frac{5}{4}$
- Автор:
  chasityhatfield
- 6 лет назад
- 0
Добавить свой ответ

Еще вопросы

Как читается по Английски эти тексты, напишите пожалуйста!

1.Paul (15, a football player): For me, football is much more interesting than music or video — it definitely comes first. But I’m not just a football fan, I’m a player as well. I practise my skills every day in the garden or down in the fields. I train hard twice a week and on Sundays. I have been playing (играю) for nine years now, and I’d like to become a professional.
Football is great and exciting. Recently I’ve won the Player of the Year award. I’ve also been on TV and on the Chelsea football programme.

2.Danny (a teenage surf instructor): Surfing is such a great sport. I don’t need much to be happy. The ocean, waves, sunny weather and my surfboard make me happy. I enjoy catching and riding a wave. Sometimes dolphins ride the waves with me and my friends. We feel safe when they’re around. But every time I go into the water I’m so glad to be out. I am happy to be alive.
Surfing makes me appreciate (ценить) my life.

3.Steve (13, a hockey fan): I’m from Quebec, home of the Montreal Canadians, the most successful professional hockey team. That’s why I’m fond of hockey. I’ve loved hockey since I was three years old.
Though I’m not good at playing I know everything about hockey, teams and players. I enjoy watching the game. I’m sure that speed and changes on ice have made hockey the most popular game in the world.
I hope to become a referee when I’m an adult.

4.Natasha (13, a figure skater): I love figure skating more than anything. It was my elder sister who brought me to the skating rink. Now I skate four times a week and I never get bored of skating. Ice, music, dance — it’s like a fairy tale. I’ve been very lucky — I’ve had a wonderful coach. I’d like to become a coach too.
I’m from a small town, so I travel to Moscow and back each week — but I love skating, so it’s worth it!
- Предмет:
  Английский язык
- Автор:
  izayahbc3k
- 6 лет назад
- Ответов:
  
  2
- Смотреть
Запишите в тетради те глаголы в прошедшем времени, которые, по вашим наблюдениям, часто произносят неправильно.
- Предмет:
  Русский язык
- Автор:
  hatfield
- 6 лет назад
- Ответов:
  
  1
- Смотреть
Сколько составлял по времени рабочий день рабочего в начале 20 века? В каком году он был снижен? Сколько дней в году отдыхал рабочий?
- Предмет:
  История
- Автор:
  timber
- 6 лет назад
- Ответов:
  
  0
- Смотреть
Найдите объём цилиндра, если его R=3, h=2/√П
- Предмет:
  Геометрия
- Автор:
  copper67
- 6 лет назад
- Ответов:
  
  1
- Смотреть

How much to ban the user?

1 hour 1 day 100 years