If \(x, y\) and \(z\) are positive, is \(x = \dfrac{y}{z^2}?\)

[VJesus12]

If \(x, y\) and \(z\) are positive, is \(x = \dfrac{y}{z^2}?\)

(1) \(z=\dfrac{y}{xz}\)
(2) \(z=\sqrt{\dfrac{y}{x}}\)

[spoiler]OA=D[/spoiler]

Source: Official Guide