Предмет: Алгебра, автор: Рамазанова5

Найдите корни уравнения x²-5x-6=0

Ответы

Автор ответа: ka40000k

0

x^2-5x-6=0;
D=b^2-4ac;
D=(-5)^2-4*1*(-6)=25+24=49=7^2; D>0 - 2 корня.
x1,2=-b±√D/2a;
x1,2=5±7/2;
x1=6
x2=-1
Ответ: x1=6; x2=-1

Предыдущий вопрос

Следующий вопрос

Интересные вопросы

Предмет: Физика, автор: medvedevadiana698

Скорость первого автомобиля 16м/с ,второго 54км/ч. Какой из них проедет большее расстояние за 2ч?

6 лет назад

Предмет: Химия, автор: kirr9l

Покажите, у какого элемента в паре больше электроотрицательность, используя знаки «>», «=» или «<»:

A) Br As
B) Mn S
C) O Cu
D) O O
E) Al P
R) H H

6 лет назад

Предмет: Английский язык, автор: Аноним

I always enjoy summer. Do you? In summer, I like to relax and forget about school. I don't
have to get up early and I can see my friends any time I want.
I like to spend my holidays with my parents. We usually go somewhere with our parents. We
love to swim, lie in the sun, but most of all I prefer going camping. We go to different places in
Britain and sometimes abroad. In Britain, I like going to Devon, Somerset and Scotland – but my
favourite place of all is Yorkshire. It has a lovely countryside and fantastic old buildings. The only
problem is the weather!
Last summer, I had two holidays. One was in Somerset, in a little village by the sea, and
another was in Naples, in Italy. I went with my mother to Italy – by train! Our trip was unforgettable!
Sam, 12 Britain
Mark the sentences True or False.
Example: Sam finds summer an enjoyable season. True
1. I usually have a relaxing timetable in winter. ______________ [1]
2. Sam prefers to remember about school during vacation time. ______________ [1]
3. Sam wants to spend his holiday with his friends than with his parents. ______________ [1]
4. Going camping is Sam’s favourite activity during holiday. _________ ____ [1]
5. He dislikes weather in Yorkshire. ______________ [1]
6. The most exciting experience was a trip to Somerset. ______________ [1]
7. Sam went with his friends to Italy by train! ______________ [1]
8.He likes to spend his holidays with his parents. ______________ [1]

6 лет назад

Предмет: Математика, автор: 65723648Димочка

314×(9072:d)=15072 помогите пожалуйсто

9 лет назад

Предмет: Литература, автор: Zo4ik

чем отличается два перевода (М.Лермонтова и В.Жуковского)стихотворения "перчатка"

9 лет назад