7-sinf matematika I variant

3.(a+a+a)(b+b+b) ifodani soddalashtiring?
A)a³b³ B)a³+b³ C)9ab D)4a·4b
4.(-2,7)·(-2,7)·(-2,7)·(-2,7) ni soddalashtiring?
A) -2,7⁴ B)4·(-2,7) C) (-2,7)⁴ D) (-2,7⁴)⁴
5. = A) 36 B) 216 C) 6 D) 256
6.Ifodani soddalashtiring: 5x-y-7x+4y=
A)2y-3x B)4x-7y C)-2x+3y D)3y-(-2x)
7.Algebraik yig’indini qavslarsiz yozing? 2a-(-3b-4c)=
A)-2a+3b+4c B)2a+3b+4c C)2a-3b-4c D)2a+3b-4c
8. 3(2a-b)-2(a-2b); a=2,7; b=4,2 bo’lganda algebraik ifodaning son qiymatini toping?
A)24,36 B)27,6 C)14 D)15
9.Qaysi bir tenglamaning ildizi 1 bo’la oladi?
A)x+6=6 B)4x-4=x+5 C)5x-8=2x-5 C) = D) + =14
10.Darajaning qaysi xossasi noto’g’ri?
A)aⁿ·a^m=a^n·m B)aⁿ:a^m=a^n-m C)(aⁿ)^m=a^n·m D)( )ⁿ=