<prompt> Bheka isigaba esingezansi bese uphendula umbuzo emva kwalokho ngolimi olufanayo nesigaba: Ukudlulisa: Ukushintshanisa u- no-- ku-expression, okungukuthi, ukuvumelanisa izixazululo ezimbili ze-equation kungabhekwa njengokusebenza kweqembu okulula kakhulu. Amafomula afanayo ayaziwa kuma-cubic nama-quartic equations, kodwa awavamile ukuba khona kuma-degree 5 nangaphezulu. Izici ezingabonakali zamaqembu kaGalois ahlobene nama-polynomials ikakhulukazi ukuxazululwa kwawo zinikeza indlela yama-polynomials anezixazululo zawo zonke ezingabonakaliswa ngama-radicals, okungukuthi, izixazululo ezingabonakaliswa kuphela ngokusebenzisa ukwengeza, ukuphindaphinda, kanye nezimpande ezifanayo nefomula elingenhla. Inkinga ingaxazululwa ngokushintshela emfundisweni yensimu futhi ucabangele insimu yokuhlukanisa ye-polynomial. Inkolelo-mbono yanamuhla kaGalois isebenzisa uhlobo olungenhla lwamaqembu kaGalois ekudlulisweni kwensimu futhi isungula ngokusebenzisa isisho esiyisisekelo senkolelo-mbono kaGalois ubudlelwano obuqondile phakathi kwezinkambu namaqembu, kugcizelela futhi ubukhona bamaqembu kwezezibalo. Umbuzo: Kungakanani lapho amafomula afanayo engekho khona?  <response>: 5 nangaphezulu 