Zgjidh (x)=3/x^2+x-12

$$( x ) = \frac { 3 } { x ^ { 2 } + x - 12 }$$

Gjej x

$$x=\frac{-2\sqrt{37}\cos(\frac{\arccos(\frac{29\sqrt{37}}{2738})}{3})-1}{3}\approx -3.887977356$$

$$x=\frac{\sqrt{37}\left(\sqrt{3}\sin(\frac{\arccos(\frac{29\sqrt{37}}{2738})}{3})+\cos(\frac{\arccos(\frac{29\sqrt{37}}{2738})}{3})\right)-1}{3}\approx 3.134169951$$

$$x=\frac{\sqrt{37}\left(-\sqrt{3}\sin(\frac{\arccos(\frac{29\sqrt{37}}{2738})}{3})+\cos(\frac{\arccos(\frac{29\sqrt{37}}{2738})}{3})\right)-1}{3}\approx -0.246192595$$