[CAES] (x^4-4*x^3+2*x^2+4*x+4) Exact factorization of Quartic Polynomial

[roadrunner]

I agree that exact solutions to 4 order equations have little value. However, I expected cfactor to switch to approximate mode automatically and give a warning when appropriate, such as csolve does; not just return the original equation unaltered. Example: when exact mode is checked, csolve((x^4-4*x^3+2*x^2+4*x+4) = 0,x) gives a warning, then supplies the approximate answer.

-paul