Разложение на множители
[src]/ _______________ / ___\\ / _______________ / ___\\
| 3 / ____ | 1 I*\/ 3 || | 3 / ____ | 1 I*\/ 3 || / _______________\
| \/ 27 + 3*\/ 78 *|- - - -------|| | \/ 27 + 3*\/ 78 *|- - + -------|| | 3 / ____ |
| 1 \ 2 2 /| | 1 \ 2 2 /| | 1 \/ 27 + 3*\/ 78 |
|x + ---------------------------------- + ----------------------------------|*|x + ---------------------------------- + ----------------------------------|*|x + ------------------ + ------------------|
| _______________ / ___\ 3 | | _______________ / ___\ 3 | | _______________ 3 |
| 3 / ____ | 1 I*\/ 3 | | | 3 / ____ | 1 I*\/ 3 | | | 3 / ____ |
| \/ 27 + 3*\/ 78 *|- - - -------| | | \/ 27 + 3*\/ 78 *|- - + -------| | \ \/ 27 + 3*\/ 78 /
\ \ 2 2 / / \ \ 2 2 / /
$$\left(x + \left(\frac{\left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right) \sqrt[3]{3 \sqrt{78} + 27}}{3} + \frac{1}{\left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right) \sqrt[3]{3 \sqrt{78} + 27}}\right)\right) \left(x + \left(\frac{1}{\left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right) \sqrt[3]{3 \sqrt{78} + 27}} + \frac{\left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right) \sqrt[3]{3 \sqrt{78} + 27}}{3}\right)\right) \left(x + \left(\frac{1}{\sqrt[3]{3 \sqrt{78} + 27}} + \frac{\sqrt[3]{3 \sqrt{78} + 27}}{3}\right)\right)$$