This is documentation for Mathematica 8, which was
based on an earlier version of the Wolfram Language.

# Cubics

 Cubics is an option for functions that involve solving algebraic equations, that specifies whether explicit forms for solutions to cubic equations should be given.
• With Cubics->True, roots of cubics are given explicitly in terms of radicals. With Cubics->False, roots of cubics that do not have very simple forms are given implicitly in terms of Root objects.
By default, Reduce does not use general formulas for solving cubics in radicals:
With Cubics->True, Reduce solves all cubics in terms of radicals:
Solving this simple cubic in radicals does not require the general formulas:
By default, Reduce does not use general formulas for solving cubics in radicals:
 Out[1]=
With Cubics->True, Reduce solves all cubics in terms of radicals:
 Out[2]=
Solving this simple cubic in radicals does not require the general formulas:
 Out[3]=
 Scope   (2)
By default, Eigenvalues does not use general formulas for solving cubics in radicals:
With Cubics->True, all cubics are solved in terms of radicals: