Answer
$x^2-9$
Work Step by Step
$$(x+3)(x-3)$$ $$(x\times x)+(x\times (-3))+(3\times x)+(3\times (-3))$$ $$x^2-3x+3x-9$$ $$x^2-9$$
College Algebra (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-32178-228-3
ISBN 13:
978-0-32178-228-1
Chapter P - Prerequisites: Fundamental Concepts of Algebra - Exercise Set P.4 - Page 61: 31
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