Answer
$5(x-3)(x+3)$
Work Step by Step
Given:$5x^2-45$
Take the common terms out.
$=5(x^2-9)$
Since, $(a-b)(a+b)=a^2-b^2$
or, $=5(x^2-3^2)$
or, $=5(x-3)(x+3)$
Hence, $5(x-3)(x+3)$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 5 - Review Exercises - Page 400: 72
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