Сумма и произведение корней
[src] ___________ ___________ ___________ ___________
/ ___ / ___ / ___ / ___
4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 4 ___ / 1 \/ 2
- \/ 2 * / - + ----- + I*\/ 2 * / - - ----- + \/ 2 * / - + ----- - I*\/ 2 * / - - -----
\/ 2 4 \/ 2 4 \/ 2 4 \/ 2 4 $$\left(\sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} - \sqrt[4]{2} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}\right) + \left(- \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + \sqrt[4]{2} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}\right)$$
/ ___________ ___________\ / ___________ ___________\
| / ___ / ___ | | / ___ / ___ |
| 4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 | |4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 |
|- \/ 2 * / - + ----- + I*\/ 2 * / - - ----- |*|\/ 2 * / - + ----- - I*\/ 2 * / - - ----- |
\ \/ 2 4 \/ 2 4 / \ \/ 2 4 \/ 2 4 /
$$\left(- \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + \sqrt[4]{2} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}\right) \left(\sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} - \sqrt[4]{2} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}\right)$$