$$(x)=\frac{4}{x^{2}}$$
$x=\sqrt[3]{4}e^{\frac{2\pi i}{3}}\approx -0.793700526+1.374729637i$
$x=\sqrt[3]{4}\approx 1.587401052$
$x=\sqrt[3]{4}e^{\frac{4\pi i}{3}}\approx -0.793700526-1.374729637i$
$x=\sqrt[3]{4}\approx 1.587401052$
