Answer
$3(x^{2}+9^{2})$
Work Step by Step
$ 3x^{2}+243\qquad$...factor out the common term, $3$
$=3(x^{2}+81)$
A sum of two squares cannot be further factored.
$=3(x^{2}+9^{2})$
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 6.5 - A General Factoring Strategy - Exercise Set - Page 462: 75
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