Question

\(\dfrac{x}{3}=\dfrac{-9}{x^2}\)

Answer 1

\(\dfrac{x}{3}=\dfrac{-9}{x^2}\Leftrightarrow x^3=-27\Leftrightarrow x=\sqrt[3]{-27}=-3\) vậy \(x=-3\)

Answer 2

\(\dfrac{x}{3}=-\dfrac{9}{x^2}\)

\(\Rightarrow x^3=-27=\left(-3\right)^3\Rightarrow x=-3\)

Vậy.................

Chúc bạn học tốt!!!

Answer 3

\(\dfrac{x}{3}=\dfrac{-9}{x^2}\)

\(\Rightarrow x^3=-27\)

\(\Rightarrow x^3=\left(-3\right)^3\)

\(\Rightarrow x=-3\)