Предмет: Алгебра, автор: nastya1055

найти дискриминант 2х²+3х-5=0

Ответы

Автор ответа: cheburek4

Д=9-4*2*(-5)=9+40=49
х=(-3+7)/4=1
х=(-3-7)/4=-5/2

Похожие вопросы

Предмет: Английский язык, автор: Subsystem

Помогите пожалуйста!!! по английскому прочитать понять текст и письменно ответить на вопросы даю 62 балла

The modern world is becoming smaller all the time. Every day distances between different countries seem less. For this reason it’s becoming more and more important to know different language, especially English. One billion people speak English today. That’s about 20% of the world’s population.

400 million people speak English as their first language. For the other 600 million people it’s either a second language or foreign language. English is the first language in the UK, the USA, Australia and New Zealand. It is one of the official languages in Canada, the Irish Republic and the Republic of South Africa.

As a second language English is spoken in more than 60 countries. It is used by the government businessmen and universities. English is the language of politics and diplomacy, science and technology, business and trade, sport and pop music. 80% of all information in the world’s computers is in English. 75% of the world’s letters and faxes are in English.

60% of all international telephone calls are made in English.

More than 60% of all scientific journals are written in English.

To know English today is absolutely necessary for every educated person, for every good specialist. Learning language is not an easy thing. It’s a long and slow process that takes a lot of time and patience. But it’s a must. English is taught throughout the world and a lot of people it quite well. In our country English is very popular: it is studied at schools (sometimes even at nursery schools), colleges and universities. Everyone will speak English soon – I’m sure of it. We all need to understand each other. To do that we need an international language, and that’s English.

1. It is easy to learn foreign languages?

2. Which language in the world is spoken by most people?

3. When did you begin learning English?

4. What was the process of learning?

5. Why is English not an easy language to learn?

6. Why is it necessary to learn English?

9. What advantages have the people who know foreign languages?

10. Have you seen any films in English?

12. What advantages have the people who know foreign languages?

7 лет назад

Предмет: Русский язык, автор: nastyavoln2007

в каком слове букв больше чем звуков 1) объем 2) здравствуй 3) маяк 4) юнга

7 лет назад

Предмет: Математика, автор: kir1324

1найдите производную функции в точке x0=-2
f(x)=3x^7-6x^5-4x^2+17
2 решите уравнения 3ctg2x=0; 2sinx=корень2

7 лет назад

Предмет: Математика, автор: Муниса11

На прилавке лежит 27 серых футболок и 3 желтых. Во сколько раз меньше желтых футболок, чем серых?

10 лет назад

Предмет: Химия, автор: natashamaka

Какие типы кристаллических решеток вам известны?

10 лет назад