Question

Tìm x biết 

\(\left(2x-1\right)^5-11^2=122\)

Answer 1

chuẩn

Answer 2

(2x-1)⁵-11²=122 (11²=121)

=> (2x-1)⁵ = 122 - 121

(2x-1)⁵ = 1

=> 2x-1 = 1

2x = 1+1

2x = 2

x = 2:2

x = 1

Answer 3

(2x-1)^5 - 11^2  =122

(2x-1)^5 - 121 =122

(2x-1)^5         = 122+121

(2x-1)^5         =243

(2x-1)^5         = 3^5

2x-1             =3

2x                =4

x                  =2

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