"This has 3 roots but two are imaginary and there is no cube formula currently known to man." |
as well as a grader pointing out:
"there is a cubic formula (and quartic), but no quintic". |
Indeed this one of the most fascinating stories in algebra.


"This has 3 roots but two are imaginary and there is no cube formula currently known to man." |
"there is a cubic formula (and quartic), but no quintic". |