College Algebra (6th Edition)

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: 34

Answer

$4x^2-25$

Work Step by Step

$$(2x+5)(2x-5)$$ $$=(2x\times 2x)+(2x\times (-5))+(5\times 2x)+(5\times (-5))$$ $$=4x^2-10x+10x-25$$ $$=4x^2-25$$
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