Question

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

Answer 1

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

\(\Rightarrow x^2=2.8\)

\(\Rightarrow x^2=16\)

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

\(\Rightarrow x=4hoặcx=-4\)

Vậy x=4 hoặc x=-4

Answer 2

=> 2.8= x.x

16= x^2

4^2= x^2

=> x=4

Vậy x=4

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