$$\begin{aligned}if(x+\frac{1}{2})(x-1)=x^{2}-1&\\ +lan\ 1ad\ a-b&\end{aligned}$$
$x\in -\sqrt[3]{2},\sqrt[3]{2}e^{\frac{\pi i}{3}},\sqrt[3]{2}e^{\frac{5\pi i}{3}},\sqrt[3]{2},\sqrt[3]{2}e^{\frac{2\pi i}{3}},\sqrt[3]{2}e^{\frac{4\pi i}{3}}$
$x=-\sqrt[3]{2}\approx -1.25992105$
$x=\sqrt[3]{2}\approx 1.25992105$
