Roots of a cubic polynomial with complex coefficients computed using symbolic solutions

[size=85] Enter the values of the [b][u]complex[/u][/b] coefficients a, b, c and d of the [b]cubic[/b] polynomial using the input fields and find its roots. The roots z1, z2, z3(are indicated in red) are calculated directly in the GeoGebra window.[/size]
– Roman Chijner

Information: Roots of a cubic polynomial with complex coefficients computed using symbolic solutions