Предмет: Алгебра, автор: popovayulya96

в уравнении х^(2) -х +с =0 один из корней равен 2 .Найти с

Ответы

Автор ответа: Djasurxon

2^2-2+c=0
4-2+c=0
2+c=0
c=-2

Автор ответа: NNNLLL54

$x^2-x+c=0\; \; ,\; \; x_1=2\\\\Teorema\; Vieta:\; \; x_1\cdot x_2=c\; ,\; \; x_1+x_2=1\Rightarrow \\\\ 2x_2=c\; ,\; 2+x_2=1\\\\x_2=1-2\; ,\; \; x_2=-1\\\\c=2\cdot (-1)=-2$

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: imranazizov56

4. Установите соответствие между текстами и их темами, выбрав тему из выпадающего списка. Используйте каждую тему только один раз. В задании одна тема лишняя. This text deals with … 1. Dangerous shoes. 2. Following the rules. 3. Angry shoppers. 4. New fashion. 5. Dress rules. 6. Wear in special areas. A. A new kind of training shoes, with wheels in the heel, are in fashion in Wales. Many teenagers asked for them at Christmas. But the manager of the St Andrew`s Shopping Centre in Liverpool says the shoes, called ‘Heelies’, are dangerous. He says kids in ‘Heelies’ can’t enter the mall. They must take them off and walk around in their socks. B. The manager, Gilmour Johnes, thinks there is a safety problem. Teenagers with these shoes could break a shop window or knock down an older customer. Mr. Johnes says that the rule against wheels is not new. ‘For many years we have had the rules against using rollerblades or skateboards in the centre.’ C. Many other malls also have specific dress rules for teenage по4. Установите соответствие между текстами и их темами, выбрав тему из выпадающего списка. Используйте каждую тему только один раз. В задании одна тема лишняя.

This text deals with …

1. Dangerous shoes.

2. Following the rules.

3. Angry shoppers.

4. New fashion.

5. Dress rules.

6. Wear in special areas.

A. A new kind of training shoes, with wheels in the heel, are in fashion in Wales. Many teenagers asked for them at Christmas. But the manager of the St Andrew`s Shopping Centre in Liverpool says the shoes, called ‘Heelies’, are dangerous. He says kids in ‘Heelies’ can’t enter the mall. They must take them off and walk around in their socks.

B. The manager, Gilmour Johnes, thinks there is a safety problem. Teenagers with these shoes could break a shop window or knock down an older customer. Mr. Johnes says that the rule against wheels is not new. ‘For many years we have had the rules against using rollerblades or skateboards in the centre.’

C. Many other malls also have specific dress rules for teenagers. In the USA, some malls have rules about wearing baseball caps. You mustn’t wear your cap to the side — the cap must be straight, and you mustn’t wear it low over your face. The security camera must be able to see your face.

D. Many of these rules are to stop big groups of teenagers getting in the way of shoppers. Groups of kids sometimes stand on the stairs or in the doors and customers can’t pass. Some shoppers are afraid of large groups of noisy teenagers. One mall manager said, ‘We are here to sell. If you don’t want to buy, we don’t want you here.’

E. However, the problem with ‘Heely’ shoes is not just the feelings of other shoppers. There is a real safety problem — these shoes can be dangerous. The company that makes them tells users not to wear them in crowded places.

5 лет назад

Предмет: Физика, автор: mmhhzh

На рисунке приведена электрическая цепь, собранная учеником для исследования зависимости силы тока, проходящего через резистор, от напряжения на нем. Какой ток проходит через резистор? (Ответ дай в амперах с точностью до сотых)

5 лет назад

Предмет: Химия, автор: MagicPeopleMan

Помогите пожалуйста с химией, срочно!

5 лет назад

Предмет: Алгебра, автор: Dinka17Lusy12

1/x-5=0
Плиз,срочно надо

8 лет назад

Предмет: Математика, автор: али1771

Вычислите в столбик с объяснением и проверкой.
241*2
312*3
122*2
211*4

8 лет назад