Answer
prime
Work Step by Step
Write 4 as $2^2$ to obtain:
$=x^2+2^2$
The binomial above is a sum of two squares.
A sum of two squares can not be factored so it is prime.
Introductory Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-805-X
ISBN 13:
978-0-13417-805-9
Chapter 6 - Section 6.4 - Factoring Special Forms - Exercise Set - Page 454: 32
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