1. Agar bo’lsa, ifodani qiymatini toping. 2

1.Agar bo’lsa, ifodani qiymatini toping.
2(k-7)(k+5)-(k-5)² –(k-7)(7+k)
A)-49 B) -43 C)49 d)43
2.( ni soddalashtiring. (a ).
A) 0 B) –a-b C) a-1 D)
3. 2,8x-3(2x-1)=2,8-3,19x tenglamani yech.
A)20 B)-2 C) 0,2 D)-20
4. tenglamani yeching : 12x²+7x +1=0
A) X₁= B) X₂
C) x_{1 D)} X<sub>2
5. tenglamani yeching.
A) 3 B)</sub> x₁=-4 x₂₌3
D)-4 C) X₁=3 X₂-3
6. 20*2^2n-6-80(4^n-1)²; ifodani soddalashtiring.
A) 4²ⁿ B)2^n-1 C)4 D)0
7. Agar 3^5x+1+3^5x-1=30 bo’lsa ning qiymatini toping.
A) B) C)0 D)1
8. (1-1\3)(1+1\3)(1+1\3⁴)(1+1\3⁸) ni ko’paytiring
A)(1-1\3¹⁶) B)(1+1\3¹⁶)
C) (1+1\3⁸) D)(-1-1\3¹⁶)
9. (2x+3)²-4(x-1)(x+1)=49 tenglamani yeching
A)-9 B)-4 C) 4 D)3
10. kasrni qisqartiring
A) -2a+1 B)2a+1 C) D)
^11. 1\2*5+1\5*8+1\11*8+1\14+1\14*17 ni hisoblang
A)5 B)5\34 C)15\34 D)1
12. sistemalar o’rniga qo’yish yo’li bilan
3x-2y=5 yeching.

1. 
   (4;5) B)(4;4) C)(-1;-4) D)(3;4)
   

^13. Proporsiyaning chetki hadlari 8 va 15 ga, o’rta hadlaridan biri 10 ga teng. Proporsiyaning ikkinchi o’rta hadini toping?
A)24 B)50 C)30 D)12
14. Abdurashid kitobning 36 betini p’qidi. Bu esa kitobning 2\5 qismini tashkil etadi. Shu kitob necha betli
A)90 B)100 C)51 D)46
15. 2x⁸-x⁴-15=0tenglamani yeching.
A)1 B)-1;3 C) D)4;-1\3
16. ni hisoblang
A) B) C) D)
17. ni hisoblang.
A) B)1 C) D)
18. (4 -3 )* +4 :1 ni hisoblang.
A)3 B)4 C)5 D)2
19. 7x²-6x+2=0 tenglamani yeching.
A) B)0,5 C)13 D)
20. -35*65 ni hisoblang.
A)50 B)30 C)40 D)20
21. ni hisoblang.
A)6 B) 4 C)2 D)1,25
22. 1(1+a^-1) kasrni bo’ling.
A B) C)a-b D)
23. Ildizini toping:2066066116
A)45454 B)45554 C) 54544 D) 55454
24. tenglamani yechung. 3^2-y=27
A) y=-1 B) y=3 C)y=1 D)-3
25) 998 sonini bo’luvchilari natular bo’luvchilarini toping.
A)1400 B) 1700 C)1500 D)4
26. -2 ko’p had va bir hadni ko’paytmasini toping?
27. umumiy mahrajini toping.
A )42(m+n) B) n-m C)42 D)42(n-m)
28. 7 sonning o’rta arifmetigi 13 ga teng . Bu sonlarga qaysi son qo’shilsa ularning o’rta arifmetigi 18 bo’ladi.
A)20 B) 73 C)30 D)53
29) aa2a+28a=a402 dan a ni toping
A)1 B) 2 C) 3 D)4
30. (4x+1)(x-1\4)=0 bo’lsa 4x+1 qanday qiymatlarni qabul qiladi .
A) (0:2) B) (-1:6) C) (12:31) D)(3:1)