Предмет: Математика, автор: arseniishkapin

1.Решите уравнение 1) -(2x-4)-3x=1-2(3-2x) 2) 1/2-1/5x=1-2x

Ответы

Автор ответа: tlq

-(2x-4)-3x=1-2(3-2x)
-2x+4-3x=1-6+4x
-5x+4=-5+4x
-5x-4x=-5-4
-9x=-9
x=1

1/2-1/5x=1-2x
x≠0
1/2-1/5x-1+2x=0
-1/2-1/5x+2x=0
-5x-2+20x²/10x=0
-5x-2+20x²=0
20x²-5x-2=0
x=-(-5)+-√(-5)²-4*20*(-2)/2*20
x=5+-√25+160/40
x=5+√185/40
x≠0
x=5-√185/40

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Литература, автор: Nikita35209

чи є місце таким жіночим характером в 21 ст. Наталка Полтавка та Маруся

5 лет назад

Предмет: Английский язык, автор: iraklidzikia

ПОМОГИТЕ,КТО БУДЕТ ПЕРВЫЙ ТОМУ САМЫЙ ЛУЧШИЙ ОТВЕТ!!
Установи соответствие между текстами и
заголовками. В задании один заголовок
лишний.

Mind your driving
Sights for the brave
Traditional industries
You won't be bored
Unpredictable weather
Helpful assistants

1. There is a lot to do in Scotland! You can visit
castles and museums. The famous Loch Ness
Lake is situated here. If you want something more
adventurous, you can try horse riding, mountain
biking, kayaking and sailing. There is no end of
things to do in Scotland, so you can be sure you'll
enjoy yourself there.
30 Of all the scary places in Scotland, the castles
provide us with the most terrifying stories. You
need courage to visit them. The castles are
known for numerous murders and cases of
violent death. Edinburgh Castle is at the top of
the list. According to the legend, there is the
ghost of a headless drummer and the ghost of a
piper, whose music can be heard even above the
noise of Edinburgh's traffic.
4. Scotland has 30,000 miles of roads. Travelling
around Scotland by car can be challenging for
foreign visitors. When travelling by car, tourists
should be very careful. When they see something
they wish to look at, they mustn't slow down as
they could be hit by the car behind. Tourists
should also remember that Scottish motorways have a speed limit of 70 miles per hour.
5 Scotland has 30,000 miles of roads. Travelling
around Scotland by car can be challenging for
foreign visitors. When travelling by car, tourists
should be very careful. When they see something
they wish to look at, they mustn't slow down as
they could be hit by the car behind. Tourists
should also remember that Scottish motorways
have a speed limit of 70 miles per hour.
6.To decide on what to wear for a walk can be a
challenge in Scotland! This country is surrounded
by so much water that the Scottish weather can
change at any moment. In fact, sometimes you
feel as though you've experienced three (or even
all four) seasons in just one day!
7. There are many breeds of Scottish dogs. One of
the most famous is the Collie. It has been bred for
many years to help shepherds. Some people say
the name Collie comes from the Gaelic word for
useful. The Collie is a dog that can do many jobs.
The Collie can guard property as well as search
for a missing chicken or drive sheep. The dogs
can be taught how to open doors and gates.

5 лет назад

Предмет: Алгебра, автор: Аноним

Дана функция y=a+3. При каких значениях a значение функции равно 5?

a=
.

5 лет назад

Предмет: Математика, автор: missgaywanuk20

На пошив сарафана нужно 3 метра ткани. Сколько таких сарафанов можно сшить из 65 метров ткани?

9 лет назад

Предмет: История, автор: РомаСаша

сочинение мини "кто такой петр1"

9 лет назад