Toshloq
tumani
Sana:_____________
15-mashg‘ulot
Dars mavzusi
.
Ko‘phadning o‘xshash hadlarini ixchamlash.
Dars
maqsadlari
:
o‗quvchilarga
oddiy
kasrlarni
o‗rgatish,
ularning fanga qiziqishlarini oshirish.
Darsning borishi
:
1. Tashkiliy qism.
2. Ko‘phadning o‘xshash hadlarini ixchamlash.
Ko‘phadning o‘xshash hadlarini ixchamlash
.
1-misol:
2-misol:
3-misol:
Misol: Ko‗phadlarni ko‗paytiring:
Yechish: 1-usul:
2-usul:
3. Mustahkamlash.
Test yechiladi.
TESTLAR.
1. (2
x
–3)
2
–
x
(–4
x
+1) ko‗phadni standart shaklga keltiring.
A) 8
x
2
–
x
+7
B) 20
x
2
–25
x
+9
C) 12
x
2
–25
x
+9
D) 2
x
2
+
x
–9
E) 8
x
2
–13
x
+9
2.
a(b
–
c)+b(c
–
a)
–
c(b
–
a)
ni soddalashtiring.
A) 2
B) 0
C) 2
ab
D) –2
ac
E) 2
bc
–2
ac
b
a
c
a
c
a
b
a
b
a
c
a
b
a
b
a
2
2
2
2
2
2
2
2
2
6
6
3
4
1
24
3
1
9
b
a
ab
b
a
ab
ab
ab
ab
a
a
b
b
a
b
a
3
2
3
2
2
2
45
1
6
1
45
1
2
5
6
1
2
5
15
1
3
1
5
,
0
5
4
1
3
2
2
1
5
2
2
2
2
2
10
12
2
1
4
9
2
3
2
2
8
3
4
3
kmn
kmn
kmn
kmn
k
m
n
nk
nm
n
mnk
2
2
1
2
2
n
n
n
n
2
4
2
2
2
2
2
1
2
3
4
2
3
2
3
4
2
2
n
n
n
n
n
n
n
n
n
n
n
n
n
2
4
2
2
2
2
2
2
2
2
1
2
3
4
2
2
3
2
3
4
2
2
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
Toshloq tumani
6. (
x
4
-
x
2
y
2
+
y
4
)(
x
2
+
y
2
) ko‗paytma o‗xshash hadlar ixchamlangandan keyin nechta
qo‗shiluvchidan iborat bo‗ladi?
A) 3
B) 4
C) 2
D) 5
E) 6
7. (
x
2
+1)(
x
4
-
x
2
+1)+(
x
3
-1)
2
ni soddalashtirgandan keyin hosil bo‗lgan ko‗phadning
nechta hadi bo‗ladi?
A) 5
B) 4
C) 3
D) 6
E) 2
8. (
y
3
-1)
2
+(
y
2
+1)(
y
4
-
y
2
+1) ni soddalashtirgandan keyin nechta haddan iborat bo‗ladi?
A) 4
B) 5
C) 6
D) 3
E) 2
9. Agar (
x
-1)
2
(
x
+1)
3
+3
x
-1 ifoda standart shakldagi ko‗phad ko‗rinishida yozilsa,
koeffitsientlarining yig‗indisi nechaga teng bo‗ladi?
A) 10
B) 4
C) 2
D) 3
E) 1
10. Agar (
x
3
-
x
+1)
3
+
x
ifoda standart shakldagi ko‗phad ko‗rinishida yozilsa,
x
ning toq
darajalari oldidagi koeffitsientlarning yig‗indisi nechaga teng bo‗ladi?
A) 1
B) 7
C) 4
D) 5
E) 3
11. –2
a
2
–2
b
2
ni
a+b
va
ab
orqali ifodalang.
A) 4
ab
-2(
a+b
)
2
B) 2(
a+b
)
2
-4
ab
C) 4
ab
+2(
a+b
)
2
D) –4
ab
-2(
a+b
)
2
E) 2(
a+b
)
2
-2
ab
12. (4
x
-3)
2
-
x
(-4
x
+1) ko‗phadni standart shaklga keltiring.
A) 8
x
2
-
x
+7
B) 20
x
2
-25
x
+9
C) 12
x
2
-25
x
+9
D) 2
x
2
+
x
-9
E) 12
x
2
-23
x
+9
13.
m
ning qanday qiymatida
x
(
x+a
)(
x+
4
b
)(
x+a+
4
b
)
+
100
m
2
ifoda to‗la
kvadrat
bo‗ladi?
A)
B)
C)
D) to‗g‗ri javob keltirilmagan
E)
bunday qiymat mavjud emas
14.
m
ning qanday qiymatida
x
(
x
+5
a
)(
x
+2
b
)(
x
+5
a
+2
b
)+25
m
2
ifoda to‗la kvadrat
bo‗ladi?
A)
B)
С)
ab
D) to‗g‗ri javob keltirilmagan
E) bunday qiymat mavjud emas
15.
m
ning qanday qiymatida
x
(
x+
4
a
)(
x+b
)(
x+
4
a+b
)
+m
2
ifoda to‗la kvadrat bo‗ladi?
A)
2
ab
B)
a
2
b
2
С)
D) to‗g‗ri javob keltirilmagan
E) bunday qiymat mavjud emas
16.
b
ning qanday qiymatida
uchhad to‗la kvadrat bo‗ladi?
A) B) С) D)
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