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: 21



Work Step by Step

$$(x-5)(x+3)$$ $$=(x\times x)+(x\times 3)+(-5\times x)+(-5\times 3)$$ $$=x^2+3x-5x-15$$ $$=x^2-2x-15$$
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