/ _______________ \ / _______________ \ / _______________\
| / ___ / ___\| | / ___ / ___\| | / ___ |
| / 81 27*\/ 5 | 1 I*\/ 3 || | / 81 27*\/ 5 | 1 I*\/ 3 || | / 81 27*\/ 5 |
| 3 / -- + -------- *|- - - -------|| | 3 / -- + -------- *|- - + -------|| | 3 / -- + -------- |
| 3 \/ 2 2 \ 2 2 /| | 3 \/ 2 2 \ 2 2 /| | 3 \/ 2 2 |
|x + ------------------------------------ + ------------------------------------|*|x + ------------------------------------ + ------------------------------------|*|x + -------------------- + --------------------|
| _______________ 3 | | _______________ 3 | | _______________ 3 |
| / ___\ / ___ | | / ___\ / ___ | | / ___ |
| | 1 I*\/ 3 | / 81 27*\/ 5 | | | 1 I*\/ 3 | / 81 27*\/ 5 | | / 81 27*\/ 5 |
| |- - - -------|*3 / -- + -------- | | |- - + -------|*3 / -- + -------- | | 3 / -- + -------- |
\ \ 2 2 / \/ 2 2 / \ \ 2 2 / \/ 2 2 / \ \/ 2 2 /
$$\left(x + \left(\frac{\left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right) \sqrt[3]{\frac{27 \sqrt{5}}{2} + \frac{81}{2}}}{3} + \frac{3}{\left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right) \sqrt[3]{\frac{27 \sqrt{5}}{2} + \frac{81}{2}}}\right)\right) \left(x + \left(\frac{3}{\left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right) \sqrt[3]{\frac{27 \sqrt{5}}{2} + \frac{81}{2}}} + \frac{\left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right) \sqrt[3]{\frac{27 \sqrt{5}}{2} + \frac{81}{2}}}{3}\right)\right) \left(x + \left(\frac{3}{\sqrt[3]{\frac{27 \sqrt{5}}{2} + \frac{81}{2}}} + \frac{\sqrt[3]{\frac{27 \sqrt{5}}{2} + \frac{81}{2}}}{3}\right)\right)$$
((x + 3/((-1/2 - i*sqrt(3)/2)*(81/2 + 27*sqrt(5)/2)^(1/3)) + (81/2 + 27*sqrt(5)/2)^(1/3)*(-1/2 - i*sqrt(3)/2)/3)*(x + 3/((-1/2 + i*sqrt(3)/2)*(81/2 + 27*sqrt(5)/2)^(1/3)) + (81/2 + 27*sqrt(5)/2)^(1/3)*(-1/2 + i*sqrt(3)/2)/3))*(x + 3/(81/2 + 27*sqrt(5)/2)^(1/3) + (81/2 + 27*sqrt(5)/2)^(1/3)/3)