Предмет: Математика, автор: Juu176

решите уравнение 3x2+10x+3=0

Ответы

Автор ответа: DedushkaBake

это квадратное уравнение
d=b²-4ac=10²-4*3*3=100-36=64
x1-2=(-b+-√d)/2a=(-10+-√64)/6=(-10+-8)/6
x1=-3
x2=-2/6=-1/3

Похожие вопросы

Предмет: Английский язык, автор: aueskhanovaaizhan03

1.Find the unit of the word.
some
A) thing
B) sun
C) night
D) cloth
E) coat

2. Choose the right prefix.
write
A) un
B) im
C) dis
D) ir
E) re

3. Find the singular noun.
A) bags
B) notebook
C) books
D) games
E) pens

4. Choose the right modal verb.
... I ask you a question?
A) Can
B) Must
C) Might
D) May
E) Could

5. Complete the sentence using There is /there are.
… a lot of good students in this class.
A) There is
B) Is there
C) There are
D) There isn’t
E) Are there

6. Find suitable word for the sentence.
People go іn for sport there.
A) Basket
B) School
C) Wood
D) Stadium
E) Mountaіns

7. Choose the right form of the verb.
Mag and her sister … in Rome last summer.
A) am
B) were
C) are
D) was
E) is

8. Choose the 3rd form of the verb.
show
A) show
B) shower
C) shown
D) showing
E) showed

9. Choose the right articles.
... books and ... notebooks are on ... desk
A) the / the/ the
B) the / -- / the
C) the / a / the
D) -- / the / the
E) a / the / the

10. Complete the sentence.
Іs he a frіend of ... .
A) my
B) hе
C) they
D) your
E) yours

11. Choose the right pronoun.
I haven’t done … wrong.
A) no
B) anything
C) something
D) nothing
E) some

12. Complete thr sentence.
We know a lot of people ... lіve іn London.
A) what
B) where
C) when
D) who
E) this

13. Complete the sentence.
My sіster іs readіng a book ...
A) yesterday
B) just then
C) now
D) the day before yesterday
E) every day

14. Choose the word with different sound.
A) exam
B) explain
C) excellent
D) excuse
E) examination

15. Find the verb ending.
A) -en
B) -ed
C) -ty
D) -y
E) –ly

16. Choose the right one.
The weather . . . get much warmer in the next few years.
A) shall
B) doesn’t
C) is going
D) didn’t
E) will
17. Choose the right variant.
A person who teaches students
A) a novelist
B) a writer
C) a visitor
D) a driver
E) a teacher

18. Find synonym of the word.
Quiet
A) Calm
B) Dull
C) Daily
D) Rainy
E) Misty

19. Choose the right form of the verb.
There … some big trees in the garden.
A) am
B) was
C) is
D) are
E) been

20. Choose the 3rd form of the verb.
know
A) knowing
B) knew
C) know
D) known
E) knows

21. Choose odd one out.
A) Pіnk
B) Blue
C) Whіte
D) Grey
E) Pretty

22. Put the sentence in negative form.
He often has dіnner at two o’clock.
A) He often doesn’t have dіnner at two o’clock.
B) He often has dіnner not at two o’clock.
C) He often not has dіnner at two o’clock.
D) He often don’t have dіnner at two o’clock.
E) He often doesn’t has dіnner at two o’clock.

23. Choose the right form of the verb.
… you . . . part in our play? You’re a really good actor, we need you!
A) Does / take
B) Has / taken
C) Shall / take
D) Will / be taking
E) Do / take

24.Find the plural noun.
A) news
B) fruit
C) money
D) hair
E) days

25. Complete the sentence in Past Indefinite.
You ... soup for breakfast last week.
A) has
B) will have
C) had
D) have
E) hasn’t

26. Complete the sentence in Present Continuous.
I … at the blackboard at the moment.
A) are standing
B) was standing
C) am standing
D) is standing
E) were standing

27.Find antonym of the word.
Wet
A) Old
B) Dry
C) Fast
D) Neat
E) Light

28. Choose the right variant.
… is power.
A)Knowledge
B) Pleasure
C) Money
D) Poverty
E) A policemen

29. Find complex word.
A) Straighten
B) Greenhouse
C) Socіalіst
D) Employment
E) Development

30. Finish the sentence.
The chіldren haven’t fіnіshed theіr work ...
A) yesterday
B) already
C) yet
D) tomorrow
E) then

6 лет назад

Предмет: Алгебра, автор: Darvin2004

100 БАЛЛОВ Помогите решить задание из тригонометрии

6 лет назад

Предмет: Английский язык, автор: aylinhva

лёгкое задание, очень. хочется узнать мнение публики.

разве там не два ответа? пожалуйста, обоснуйте :)

6 лет назад

Предмет: Биология, автор: shararam

1.Какой уровень организации является минимальным для живого организма?а)молекулярный
б) клеточный
в) тканевой
г) организменный
2. Растения образуют необходимые органические вещества в процессе:
а) поглощения кислорода
б) испарения воды
в) фотосинтез
г) выделения углекислого газа
Помогите пожалуйста, 6 класс

9 лет назад

Предмет: Математика, автор: polyak99

человек ростом 1.5 стоит на расстоянии 20 шагов от столба, на котором висит фонарь. тень человека равна трем шагам. На какой высоте (в метрах) расположен фонарь?

9 лет назад