1. Let q-p" be a prime power. Show that X+ 1 is irreducible in F [X] if and only if q=3 mod4. (Hint: Use the fact that F is cyclic, also since its an if and only if please prove both directions)

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter2: The Integers
Section2.3: Divisibility
Problem 30E: Let be as described in the proof of Theorem. Give a specific example of a positive element of .
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1. Let q-p" be a prime power. Show that X+ 1 is irreducible in F_[X] if
and only if q=3 mod4. (Hint: Use the fact that F
is cyclic, also since
its an if and only if please prove both directions)
Transcribed Image Text:1. Let q-p" be a prime power. Show that X+ 1 is irreducible in F_[X] if and only if q=3 mod4. (Hint: Use the fact that F is cyclic, also since its an if and only if please prove both directions)
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