"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.

Sometimes, there is interesting insight in exams of students.
From the second midterm exam, a citation of a student paper:

as well as a grader pointing out:

Indeed this one of the most fascinating stories in algebra.

And here is an other nice quote which explains thy the surface area is zero:
it is a wormhole.

"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.