Question

\(\dfrac{1}{-27}\) = (\(\dfrac{1}{-x}\))³

Answer 1

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

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

`-3=-x`

`x=3`

Vậy `x=3`

Answer 2

\(\left(\dfrac{1}{-x}\right)^3=\dfrac{1}{-27}=\left(\dfrac{1}{-3}\right)^3\Rightarrow-x=-3\Leftrightarrow x=3\)