Предмет: Алгебра, автор: kotenochek15

Упростите выражение (в-2)2 - 4в(2в-1)

Ответы

Автор ответа: 555Елизавета5551

1

( в-2)^2-4в(2в-1)= в^2-4в+4-8в^2+4в= -7в^2+4

наговицин4587: https://znanija.com/task/28998235

Предыдущий вопрос

Следующий вопрос

Интересные вопросы

Предмет: Математика, автор: EasyMaths

Решение квадратного уравнения. $x^2-5x+6=0$

6 лет назад

Предмет: Английский язык, автор: sarsembekdias1234567

1.Choose the right variant: Bahtiyar … a student.
is
..am
..are
..are not
..am not
2.Choose the right variant: He put money into … pocket.
..his
..some
..mine
..these
..our
3.Find the antonym: full
..empty
..fall
..weak
..busy
.crowded
4.Choose the right variant: There … telephones in every room.
.are
was
am
be
is
5. Choose the right variant: … USA is … fourth largest country in … world.
the, the, the
the, --, a
a, --, the
a, a, the
a, the
6.Choose the right variant: … your parents in France now?
are
do
have
did
is
7. Choose the right variant: David wants … egg sandwich.
an
a
any
much
some
8.Choose the right variant: She is fond … pop music.
?????.......of
in
with
for
after
9.Сhoose the plural form of the noun: woman
women
woman
wemen
womans
womanes
10. Choose the right variant: He is interested … collecting stamps.
in
at
of
with
for

11.Choose the right variant: She … five languages.
speaks
speak
speaking
spokes
spoken

12.Choose the right variant: We … the citizens of Kazakhstan.
are
be
is
been
am
13.Choose the right variant: My brother … English magazines.
has
have
is
are
am
14.Choose the right variant: … you got a flat in Kiev?
have
are
is
has
am
15. Choose the right variant: I … very busy today.
am
have
is
has
are

16.Choose the right variant : … the floor clean?
Is
Have
Are
Has
Am
17. Choose the right variant: …you well ?
Are
Have
Is
Has
Am
18.Choose the right variant: How many students …present ?
are
have
is
has
am
19.Choose the right variant: Who …thin paper?
has
have
is
are
am
20. Choose the correct article: I have … lot of English books.
a
an
the
0
by
21. Choose the correct article: His father is … old.

an
the
a
by
22. Choose the correct article: She is … architect.
an

the
a
by

23.Choose the correct article: My brothers are … doctors.

an
the
a
by
24. Choose the correct article: I am … artist.
an

the
a
by
25. Choose the correct article: These are … nice ties.

an
a
the
by
26. Choose the right variant: Boris has no father. His father is … .
dead
social work
absent
a worker
a teacher
27. Choose the right variant: … English in class !
speak
spell
close
open
close
28. Find the antonym: young
old
nice
small
nice
fat
29. Find the antonym: to be well
to be ill
to be married
to be fine
to be bad
to be absent

30.Find the antonym: thin
thick
big
large
bad
small
31.Find the antonym: to be present
to be absent
to be well
to be fond of
to be bad
to be ill
32. Find the right variant: He …at the theatre yesterday.
was
is
that
this
they
33.Find the right variant: I invited my friend to ... place.
my
his
me
mine
her
34. Find the right variant: It’s easy, you can do it…
yourself
you
your
yours
myself
35. Choose the right variant: There … three windows in my room.
are
am
be
was
is
36. Which of the nouns is used with article an?
umbrella
rose
table
plane
game
37. Find the right variant: How many pages … there in this book?
are
us
do
be
was
38. Find the correct plural form: These … are teachers.
women
a woman
man
a men
woman
39. Choose the right article: This is … fine map.
a
an
in

for
40.Choose the word that does not belong to clothes:
flower
pajama
suit
trousers
blouse

6 лет назад

Предмет: Русский язык, автор: nastaplatonova02163

Как вы понимаете народную мудрость «У каждой эпохи свои законы, как в горах - свои животные»?

6 лет назад

Предмет: Биология, автор: Viktoriya311074

46 до исторических растений

9 лет назад

Предмет: Математика, автор: Маша23231

17тонн 5центеров * 18

9 лет назад