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 - Page 61: 32



Work Step by Step

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