Question

2/x=x/8

Answer 1

`2/x=x/8`

`=> 2.8=x.x`

`=>x^2=16`

`=>x^2=4^2`

\(\Rightarrow\left[{}\begin{matrix}x=4\\x=-4\end{matrix}\right.\)

Answer 2

\(\dfrac{2}{x}=\dfrac{x}{8}\)

\(\Rightarrow2.8=x.x\)

\(\Rightarrow16=x^2\)

\(\Rightarrow\left[{}\begin{matrix}16=4^2\\16=\left(-4\right)^2\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=4\\x=-4\end{matrix}\right.\)

Vậy ........

Answer 3

2/x=x/8

=> 2:x=x:8

=> 2=x:8.x

=> 2=x .x x1/8

=> 2:1/8=x.x

=>16=x.x

=>x=4