Question

[Lê Phương Linh]

5^2x-1=125

5^2x-1=125

Answer 1

[HT.Phong (9A5)]

\(5^{2x-1}=125\\ =>5^{2x-1}=5^3\\ =>2x-1=3\\ =>2x=3+1\\ =>2x=4\\ =>x=\dfrac{4}{2}\\ =>x=2\)

Vậy: ... 

Answer 2

[Mai Trung Hải Phong]

5^{2x - 1} = 125

5^{2x - 1} = 5³

2x - 1 = 3

2x      = 3 +1

2x      = 4

  x      = 4 :2

  x      = 2