Answer
$4x^2-25$
Work Step by Step
$$(2x+5)(2x-5)$$ $$=(2x\times 2x)+(2x\times (-5))+(5\times 2x)+(5\times (-5))$$ $$=4x^2-10x+10x-25$$ $$=4x^2-25$$
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: 34
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