Question

4. ( 3x -1 )³ - 5² =475 

Answer 1

`4*(3x-1)^3 -5^2=475`

`=>4*(3x-1)^3 = 475 +25`

`=>4*(3x-1)^3 = 500`

`=>(3x-1)^3=500:4`

`=>(3x-1)^3= 125`

`=> (3x-1)^3=5^3`

`=>3x-1=5`

`=>3x=5+1`

`=>3x=6`

`=>x=6/3=2`

Answer 2

4.(3x-1)³-5²=475

4.(3^x-1)^3-25=475

4.(3^x-1)³=475 +25

4.(3^x-1)³=500

(3^x-1)³=500:4

(3^x-1)³=125

(3^x-1)³ =5³

3^x-1=5

3^x=5+1

3^x=6

x=6/3

x=2