\left\{\left\{x\to \frac{1}{2} \left(-1-\sqrt{13}\right)\right\},\left\{x\to \frac{1}{2} \left(-1-\sqrt{13}\right)\right\},\left\{x\to \frac{1}{2} \left(-1+\sqrt{13}\right)\right\},\left\{x\to \frac{1}{2} \left(-1+\sqrt{13}\right)\right\}\right\}