Let n E Z. Show that f(x) = x3 – nx +2 is irreducible over Q for %3D n + -1,3, 5.

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter8: Polynomials
Section8.3: Factorization In F [x]
Problem 22E: Let ab in a field F. Show that x+a and x+b are relatively prime in F[x].
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Let n e Z. Show that f(x) = x3 –
nx + 2 is irreducible over Q for
n+ -1,3,5.
Transcribed Image Text:Let n e Z. Show that f(x) = x3 – nx + 2 is irreducible over Q for n+ -1,3,5.
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