$\"\"$

Given function $\"\"$ .

The f(x) has degree 3 and three zeros.

\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \

Above table one zero at $\"\"$ , the depressed polynomial of this zero, $\"\"$ is quadratic.

$\"\"$

The quadratic equation is $\"\"$ .

$\"Syntax$

$\"x$

The function has one real zero at $\"\"$ and two imaginary roots,

$\"x$ . $\"\"$

The solution is $\"\"$ , two imaginary roots $\"x$ .