86 : [2 . (2x - 1)2 - 7] +42=2.32
86 : [2.(2x-1)2-7] + 16 = 2.9
86 : [2.(2x-1)2-7] +16 = 18
86 : [2.(2x-1)2-7]=18-16
86 : [2.(2x-1)2-7]=2
2.(2x-1)2-7=86:2
2.(2x-1)2-7=43
2.(2x-1)2=43+7
2.(2x-1)2=50
(2x-1)2=50:2
(2x-1)2=25
(2x-1)2=52
=>2x-1=5
2x=5+1
2x=6
x=6:2
x=3
Số nguyên x thỏa mãn: 86: [2. 5 𝑥−1 – 7] + 42 = 2.32
giúp mình với ạ
86: [2. (2x - 1)2 – 7] + 42 = 2.32
Tìm x ϵ Z:
a) 86 : [2. (2x + 1)2 - 7] + 42 = 2 . 32
b) 20 - [42 + (x - 6)] = 90
c) 1000 : [30 + (2x - 6)] = 32 + 42
d) (x + 11) ⋮ (x + 2) , x ϵ N
Giúp mk với !!
86 : [2 . (2x - 1) ^2 -7 ] + 4^2 = 2 . 3^2
a) 124-2x{156-6x[54-2x(9+6)]} x X=86
b) 42-(2x + 32)+ 12:2=6
Giúp mk nha rùi mk tịck cho!
86:[2.(2x-1)2-7]+42=2.32
86:[2.(2x-1)2-7]+42=2.32
86:(2.(2x-1)2-7)+42=2.32
Tìm x thuộc Z biết:
86 : [ 2 . ( 2x - 1 )^2 - 7 ] + 4^2 = 2 . 3^2
