<prompt> I-Passage: Ukushintshanisa u- no- - ku-expression, i.e., ukuguqula izixazululo ezimbili ze-equation kungabhekwa njengokusebenza kweqembu okulula kakhulu. Amafomula afanayo ayaziwa kuma-cubic nama-quartic equations, kodwa awekho ngokujwayelekile ku-degree 5 nangaphezulu. Izakhiwo ezifingqiwe zamaqembu kaGalois ahlobene nama-polynomials ikakhulukazi ukuxazululwa kwawo zinikeza indinganiso yama-polynomials anezixazululo zawo zonke ezivezwa ngama-radicals, i.e., izixazululo ezivezwa kusetshenziswa kuphela ukuhlanganisa, ukuphindaphinda, nezimpande ezifanayo nefomula elingenhla. Inkinga ingabhekwana nayo ngokushintshela emcabangweni wamasimu futhi ucabangele ukuhlukaniswa kwamasimu we-polynomial.  <response>: 5 nangaphezulu 