giúp tôi vs mọi nguòi

`a)` `(x-1)^3=1/8`

`(x-1)^3=(1/2)^3`

`x-1=1/2`

`x=1/2+1`

`x=1/2+2/2`

`x=3/2`

Vậy `x=3/2`

``

`b)` `(x+5)^3=-64/125`

`(x+5)^3=(-4/5)^3`

`x+5=-4/5`

`x=-4/5-5`

`x=-29/5`

Vậy `x=-29/5`

``

`c)` `(2x-1)^3=8/27`

`(2x-1)^3=(2/3)^3`

`2x-1=2/3`

`2x=2/3+1`

`2x=5/3`

`x=5/3:2`

`x=5/6`

Vậy `x=5/6`

``

Bài `11:`

`a)`

`(3-x)^3=(-27)/64`

`(3-x)^3=(-3/4)^3`

`3-x=-3/4`

`x=3+3/4`

`x=15/4`

Vậy `x=15/4`

`b)`

`(x-5)^3=1/27`

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

`x-5=1/3`

`x=1/3+5`

`x=16/3`

Vậy `x=16/3`

`c)` `(6-x)^3=(-125)/8`

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

`6-x=-5/2`

`x=6+5/2`

`x=17/2`

Vậy `x=17/2`

``

Bài `12:`

`a)` `(x-1/3)^3=(-8)/27`

`(x-1/3)^3=(-2/3)^3`

`x-1/3=-2/3`

`x=-2/3+1/3`

`x=-1/3`

Vậy `x=-1/3`

`b)` `(x-1/2)^3=27/8`

`(x-1/2)^3=(3/2)^3`

`x-1/2=3/2`

`x=3/2+1/2`

`x=2`

Vậy `x=2`

`c)` `(x-1/2)^3=-8`

`(x-1/2)^3=(-2)^3`

`x-1/2=-2`

`x=-2+1/2`

`x=-3/2`

Vậy `x=-3/2`

``

Bài `13:`

`a)` `(x-1/3)^3=8/27`

`(x-1/3)^3=(2/3)^3`

`x-1/3=2/3`

`x=2/3+1/3`

`x=1`

Vậy `x=1`

`b)` `(x-1/8)^3=(-8)/125`

`(x-1/8)^3=(-2/5)^3`

`x-1/8=-2/5`

`x=-2/5+1/8`

`x=-11/40`

Vậy `x=-13/24`

`c)` `(x-5/2)^3=(-1)/8`

`(x-5/2)^3=(-1/2)^3`

`x-5/2=-1/2`

`x=-1/2+5/2`

`x=2`

Vậy `x=2`