7-sinf O’xshash hadlarni ihchamlang

7-sinf

1.O’xshash hadlarni ihchamlang:4a+2b+a-b

2.Ifodani soddalashtiring va son qiymatini toping:

5(3x-7)+2(1-x) x=

3.Tenglamani ildizga ega emasligini ko’rsating:

28-20x=2x+25-16x-12-6x

4.Uchta javonda hammasi bolib385ta kitobbor. Birinchi javonda 2-ga qaraganda 8ta kop,ammo uchinchi javondagidan 9ta kam kitob bor. Har bir javonda nechtadan kitob bor?

5.Ko’paytmani daraja shaklida yozing: 2*2*2*2*2

6.Ifodani soddalashtiring: P*P*P*P+Q*Q

7.Tenglamani yeching: =4⁵

8.(x-2)(x²+2x+4)=x^3-8x+16

9. Sonlardan qaysi biri katta: 54⁴ mi yoki 21¹²

10.Sonni standart shaklda yozing: 26000

11.Son qiymatini toping: a³ a=-2

12.Son qiymatini toping: -aba+a²b*2ab²+4 a=2,b=

13.Algebraik yeg’indisini tiping: (4x+2)+(-x-1)

14. P=5a²+b Q=-4a²-b P+Q=?

15.Ifodani soddalashtiring: 7(4p+3)-6(5+7p)

16.Qiymatni toping: 3ab(4a²-b²)+4ab(b²-3a²) a=10 b=-5

17.Nuqtalar orniga to’g’ri tenglikni qoying:

(2a-5b)(..-..)=6a³-15a²b-14ab+…

18. (- ):(-)

19.Ifodani soddalashtiring: (6a²-3a²):a²+(12a²+9a):3a

20.Ko’paytuvchilarga ajrating: a(m+n)+(m+n)

21. ac+bc-2ad-2bd

22.Tenglamani yrching: x(x-4)+x-4=0

23. x²-4x+4-25=0

24.Qisqa ko’paytirish formulalaridan foydalanib bajaring: (90-1)

25. 999²

26. 57²

27. Isbot qiling: (-a-b)²=(a+b)²

28.Tenglamani yechung: (2x+3)²-4(x-1)(x+1)=49

29. Hisoblang:

30. 50.7²-50.6²