Question

tìm x

\(\left(5-2x\right)^3\)-27=0

Answer 1

`(5-2x)^3-27=0`

`<=>(5-2x)^3=27`

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

`<=>5-2x=3`

`<=>2x=2<=>x=1`

Answer 2

`(5-2x)^3 -27=0`

`<=> (5-2x)^3=0+27`

`<=> (5-2x)^3=27`

`<=> (5-2x)^3= 3^3`

`<=> 5-2x=3`

`=> 2x=5-3`

`=> 2x= 2`

`=>x=2:2`

`=>x=1`

vậy `x=1`