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MATEMATIKA 1 Senka Banic PREDAVANJA (grupa G1): utorak i ...

MATEMATIKA 1 Senka Banic PREDAVANJA (grupa G1): utorak i ...

MATEMATIKA 1 Senka Banic PREDAVANJA (grupa G1): utorak i ...

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8c) Vrijedi: q 4 (1) 6= 0, pa q 4 nema cjelobrojnih nula. Tako ¯der x 4 6= 1 8x 2 R; panema ni realnih nula. Nadalje,q 4 (x) = x 4 + 1 = x 4 + 2x 2 + 1 2x 2 = x 2 + 1 2p 22x=x 2 + 1p2xx 2 + 1 + p 2xFAKTORIZACIJA NAD R:Budući da jex 2 p2x + 1 = 0 () x1;2 =p p2 22 2 i ;x 2 + p 2x + 1 = 0 () x 1;2 =to dobivamo sljedeću FAKTORIZACIJU NAD C:p p ! p p ! p2 22 22q 4 (x) = x2 2 i x2 + 2 i x +2p22 p22 i ;p22 i ! x +p22 + p22 i !:

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