Подробное решение
Дано уравнение
$$x^{8} = -64$$
Т.к. степень в ур-нии равна = 8 и свободный член = -64 < 0,
зн. действительных решений у соотв. ур-ния не существует
Остальные 8 корня(ей) являются комплексными.
сделаем замену:
$$z = x$$
тогда ур-ние будет таким:
$$z^{8} = -64$$
Любое комплексное число можно представить так:
$$z = r e^{i p}$$
подставляем в уравнение
$$r^{8} e^{8 i p} = -64$$
где
$$r = 2^{\frac{3}{4}}$$
- модуль комплексного числа
Подставляем r:
$$e^{8 i p} = -1$$
Используя формулу Эйлера, найдём корни для p
$$i \sin{\left(8 p \right)} + \cos{\left(8 p \right)} = -1$$
значит
$$\cos{\left(8 p \right)} = -1$$
и
$$\sin{\left(8 p \right)} = 0$$
тогда
$$p = \frac{\pi N}{4} + \frac{\pi}{8}$$
где N=0,1,2,3,...
Перебирая значения N и подставив p в формулу для z
Значит, решением будет для z:
$$z_{1} = - 2^{\frac{3}{4}} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + 2^{\frac{3}{4}} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}$$
$$z_{2} = 2^{\frac{3}{4}} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} - 2^{\frac{3}{4}} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}$$
$$z_{3} = - 2^{\frac{3}{4}} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} - 2^{\frac{3}{4}} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}$$
$$z_{4} = 2^{\frac{3}{4}} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + 2^{\frac{3}{4}} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}$$
$$z_{5} = - \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + \sqrt[4]{2} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}$$
$$z_{6} = \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} - \sqrt[4]{2} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + \sqrt[4]{2} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}$$
$$z_{7} = - \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} - \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} - \sqrt[4]{2} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}$$
$$z_{8} = - \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} - \sqrt[4]{2} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} - \sqrt[4]{2} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}$$
делаем обратную замену
$$z = x$$
$$x = z$$
Тогда, окончательный ответ:
$$x_{1} = - 2^{\frac{3}{4}} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + 2^{\frac{3}{4}} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}$$
$$x_{2} = 2^{\frac{3}{4}} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} - 2^{\frac{3}{4}} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}$$
$$x_{3} = - 2^{\frac{3}{4}} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} - 2^{\frac{3}{4}} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}$$
$$x_{4} = 2^{\frac{3}{4}} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + 2^{\frac{3}{4}} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}$$
$$x_{5} = - \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + \sqrt[4]{2} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}$$
$$x_{6} = \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} - \sqrt[4]{2} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + \sqrt[4]{2} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}$$
$$x_{7} = - \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} - \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} - \sqrt[4]{2} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}$$
$$x_{8} = - \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} - \sqrt[4]{2} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} - \sqrt[4]{2} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}$$
___________ ___________
/ ___ / ___
3/4 / 1 \/ 2 3/4 / 1 \/ 2
x1 = - 2 * / - - ----- + I*2 * / - + -----
\/ 2 4 \/ 2 4
$$x_{1} = - 2^{\frac{3}{4}} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + 2^{\frac{3}{4}} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}$$
___________ ___________
/ ___ / ___
3/4 / 1 \/ 2 3/4 / 1 \/ 2
x2 = 2 * / - - ----- - I*2 * / - + -----
\/ 2 4 \/ 2 4
$$x_{2} = 2^{\frac{3}{4}} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} - 2^{\frac{3}{4}} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}$$
___________ ___________
/ ___ / ___
3/4 / 1 \/ 2 3/4 / 1 \/ 2
x3 = - 2 * / - + ----- - I*2 * / - - -----
\/ 2 4 \/ 2 4
$$x_{3} = - 2^{\frac{3}{4}} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} - 2^{\frac{3}{4}} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}$$
___________ ___________
/ ___ / ___
3/4 / 1 \/ 2 3/4 / 1 \/ 2
x4 = 2 * / - + ----- + I*2 * / - - -----
\/ 2 4 \/ 2 4
$$x_{4} = 2^{\frac{3}{4}} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + 2^{\frac{3}{4}} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}$$
/ ___________ ___________\ ___________ ___________
| / ___ / ___ | / ___ / ___
|4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 | 4 ___ / 1 \/ 2 4 ___ / 1 \/ 2
x5 = I*|\/ 2 * / - - ----- + \/ 2 * / - + ----- | + \/ 2 * / - + ----- - \/ 2 * / - - -----
\ \/ 2 4 \/ 2 4 / \/ 2 4 \/ 2 4
$$x_{5} = - \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + i \left(\sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}\right)$$
/ ___________ ___________\ ___________ ___________
| / ___ / ___ | / ___ / ___
|4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 | 4 ___ / 1 \/ 2 4 ___ / 1 \/ 2
x6 = I*|\/ 2 * / - - ----- - \/ 2 * / - + ----- | + \/ 2 * / - - ----- + \/ 2 * / - + -----
\ \/ 2 4 \/ 2 4 / \/ 2 4 \/ 2 4
$$x_{6} = \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + i \left(- \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}\right)$$
/ ___________ ___________\ ___________ ___________
| / ___ / ___ | / ___ / ___
|4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 | 4 ___ / 1 \/ 2 4 ___ / 1 \/ 2
x7 = I*|\/ 2 * / - + ----- - \/ 2 * / - - ----- | - \/ 2 * / - - ----- - \/ 2 * / - + -----
\ \/ 2 4 \/ 2 4 / \/ 2 4 \/ 2 4
$$x_{7} = - \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} - \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + i \left(- \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}\right)$$
/ ___________ ___________\ ___________ ___________
| / ___ / ___ | / ___ / ___
| 4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 | 4 ___ / 1 \/ 2 4 ___ / 1 \/ 2
x8 = I*|- \/ 2 * / - - ----- - \/ 2 * / - + ----- | + \/ 2 * / - - ----- - \/ 2 * / - + -----
\ \/ 2 4 \/ 2 4 / \/ 2 4 \/ 2 4
$$x_{8} = - \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + i \left(- \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} - \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}\right)$$
Сумма и произведение корней
[src] ___________ ___________ ___________ ___________ ___________ ___________ ___________ ___________ / ___________ ___________\ ___________ ___________ / ___________ ___________\ ___________ ___________ / ___________ ___________\ ___________ ___________ / ___________ ___________\ ___________ ___________
/ ___ / ___ / ___ / ___ / ___ / ___ / ___ / ___ | / ___ / ___ | / ___ / ___ | / ___ / ___ | / ___ / ___ | / ___ / ___ | / ___ / ___ | / ___ / ___ | / ___ / ___
3/4 / 1 \/ 2 3/4 / 1 \/ 2 3/4 / 1 \/ 2 3/4 / 1 \/ 2 3/4 / 1 \/ 2 3/4 / 1 \/ 2 3/4 / 1 \/ 2 3/4 / 1 \/ 2 |4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 | 4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 |4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 | 4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 |4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 | 4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 | 4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 | 4 ___ / 1 \/ 2 4 ___ / 1 \/ 2
0 + - 2 * / - - ----- + I*2 * / - + ----- + 2 * / - - ----- - I*2 * / - + ----- + - 2 * / - + ----- - I*2 * / - - ----- + 2 * / - + ----- + I*2 * / - - ----- + I*|\/ 2 * / - - ----- + \/ 2 * / - + ----- | + \/ 2 * / - + ----- - \/ 2 * / - - ----- + I*|\/ 2 * / - - ----- - \/ 2 * / - + ----- | + \/ 2 * / - - ----- + \/ 2 * / - + ----- + I*|\/ 2 * / - + ----- - \/ 2 * / - - ----- | - \/ 2 * / - - ----- - \/ 2 * / - + ----- + I*|- \/ 2 * / - - ----- - \/ 2 * / - + ----- | + \/ 2 * / - - ----- - \/ 2 * / - + -----
\/ 2 4 \/ 2 4 \/ 2 4 \/ 2 4 \/ 2 4 \/ 2 4 \/ 2 4 \/ 2 4 \ \/ 2 4 \/ 2 4 / \/ 2 4 \/ 2 4 \ \/ 2 4 \/ 2 4 / \/ 2 4 \/ 2 4 \ \/ 2 4 \/ 2 4 / \/ 2 4 \/ 2 4 \ \/ 2 4 \/ 2 4 / \/ 2 4 \/ 2 4
$$\left(- \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + i \left(- \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} - \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}\right)\right) - \left(- \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} - i \left(\sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}\right) - i \left(- \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}\right) - i \left(- \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}\right)\right)$$
/ ___________ ___________\ / ___________ ___________\ / ___________ ___________\ / ___________ ___________\
| / ___ / ___ | | / ___ / ___ | | / ___ / ___ | | / ___ / ___ |
|4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 | |4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 | |4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 | | 4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 |
I*|\/ 2 * / - - ----- + \/ 2 * / - + ----- | + I*|\/ 2 * / - - ----- - \/ 2 * / - + ----- | + I*|\/ 2 * / - + ----- - \/ 2 * / - - ----- | + I*|- \/ 2 * / - - ----- - \/ 2 * / - + ----- |
\ \/ 2 4 \/ 2 4 / \ \/ 2 4 \/ 2 4 / \ \/ 2 4 \/ 2 4 / \ \/ 2 4 \/ 2 4 /
$$i \left(- \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} - \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}\right) + i \left(- \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}\right) + i \left(- \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}\right) + i \left(\sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}\right)$$
/ ___________ ___________\ / ___________ ___________\ / ___________ ___________\ / ___________ ___________\ / / ___________ ___________\ ___________ ___________\ / / ___________ ___________\ ___________ ___________\ / / ___________ ___________\ ___________ ___________\ / / ___________ ___________\ ___________ ___________\
| / ___ / ___ | | / ___ / ___ | | / ___ / ___ | | / ___ / ___ | | | / ___ / ___ | / ___ / ___ | | | / ___ / ___ | / ___ / ___ | | | / ___ / ___ | / ___ / ___ | | | / ___ / ___ | / ___ / ___ |
| 3/4 / 1 \/ 2 3/4 / 1 \/ 2 | | 3/4 / 1 \/ 2 3/4 / 1 \/ 2 | | 3/4 / 1 \/ 2 3/4 / 1 \/ 2 | | 3/4 / 1 \/ 2 3/4 / 1 \/ 2 | | |4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 | 4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 | | |4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 | 4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 | | |4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 | 4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 | | | 4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 | 4 ___ / 1 \/ 2 4 ___ / 1 \/ 2 |
1*|- 2 * / - - ----- + I*2 * / - + ----- |*|2 * / - - ----- - I*2 * / - + ----- |*|- 2 * / - + ----- - I*2 * / - - ----- |*|2 * / - + ----- + I*2 * / - - ----- |*|I*|\/ 2 * / - - ----- + \/ 2 * / - + ----- | + \/ 2 * / - + ----- - \/ 2 * / - - ----- |*|I*|\/ 2 * / - - ----- - \/ 2 * / - + ----- | + \/ 2 * / - - ----- + \/ 2 * / - + ----- |*|I*|\/ 2 * / - + ----- - \/ 2 * / - - ----- | - \/ 2 * / - - ----- - \/ 2 * / - + ----- |*|I*|- \/ 2 * / - - ----- - \/ 2 * / - + ----- | + \/ 2 * / - - ----- - \/ 2 * / - + ----- |
\ \/ 2 4 \/ 2 4 / \ \/ 2 4 \/ 2 4 / \ \/ 2 4 \/ 2 4 / \ \/ 2 4 \/ 2 4 / \ \ \/ 2 4 \/ 2 4 / \/ 2 4 \/ 2 4 / \ \ \/ 2 4 \/ 2 4 / \/ 2 4 \/ 2 4 / \ \ \/ 2 4 \/ 2 4 / \/ 2 4 \/ 2 4 / \ \ \/ 2 4 \/ 2 4 / \/ 2 4 \/ 2 4 /
$$1 \left(- 2^{\frac{3}{4}} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + 2^{\frac{3}{4}} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}\right) \left(2^{\frac{3}{4}} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} - 2^{\frac{3}{4}} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}\right) \left(- 2^{\frac{3}{4}} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} - 2^{\frac{3}{4}} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}\right) \left(2^{\frac{3}{4}} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + 2^{\frac{3}{4}} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}\right) \left(- \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + i \left(\sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}\right)\right) \left(\sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + i \left(- \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}\right)\right) \left(- \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} - \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + i \left(- \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}\right)\right) \left(- \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} + \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + i \left(- \sqrt[4]{2} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}} - \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}\right)\right)$$
x1 = 1.55377397403004 - 0.643594252905583*i
x2 = -1.55377397403004 - 0.643594252905583*i
x3 = -0.643594252905583 - 1.55377397403004*i
x4 = -0.643594252905583 + 1.55377397403004*i
x5 = 1.55377397403004 + 0.643594252905583*i
x6 = -1.55377397403004 + 0.643594252905583*i
x7 = 0.643594252905583 + 1.55377397403004*i
x8 = 0.643594252905583 - 1.55377397403004*i