Question

(2-5x )^3 = -27/125

Answer 1

`(2-5x)^3 = -27/125`

`(2-5x)^3 = (-3/5)^3`

`2-5x=-3/5`

`5x=2-(-3/5)`

`5x=2+3/5`

`5x=10/5 +3/5`

`5x=13/5`

`x=13/5:5`

`x=13/5 . 1/5`

`x=13/25`

Vậy`x=13/25` 

Answer 2

`(2-5x )^3 = -27/125`

`=>(2-5x )^3 =(-3/5)^3`

`=>2-5x=-3/5`

`=>5x=2-(-3/5)`

`=>5x= 2+3/5`

`=>5x= 2,6`

`=>x=2,6:5`

`=>x=0,52`