$$Q_{2}IF\ Z_{1}=\frac{3}{2}-\frac{1}{2}i; Z_{2}=\frac{1}{2}-\frac{3}{2}i; (i)^{3}Z_{1}+Z_{2}=Z_{1}+Z_{2}; uij-Z_{1}-Z_{2}=Z_{1}-Z_{2}$$
$z=-1\text{, }z_{1}=1\text{, }z_{2}=\frac{23-\sqrt{445}}{2}\approx 0.952488445\text{, }a=1$
$z=-1\text{, }z_{1}=1\text{, }z_{2}=\frac{\sqrt{445}+23}{2}\approx 22.047511555\text{, }a=1$
