Contemporary Abstract Algebra
Contemporary Abstract Algebra
9th Edition
ISBN: 9781305657960
Author: Joseph Gallian
Publisher: Cengage Learning
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Chapter 18, Problem 26E

In Z [ 2 ] = { a + b 2 | a , b Z } , show that every element of the form ( 3 + 2 2 ) n is a unit, where n is a positive integer.

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