Answer
Prime.
Work Step by Step
Although we can rewrite the expression as:
$144z^2+121=(12z)^2+11^2$
Because it is a plus sign in the middle, this expression is a prime and can not be factored without using imaginary symbol $i$.
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter R - Review of Basic Concepts - R.4 Factoring Polynomials - R.4 Exercises - Page 44: 111
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