Answer
$x^2-2x-15$
Work Step by Step
$$(x-5)(x+3)$$ $$=(x\times x)+(x\times 3)+(-5\times x)+(-5\times 3)$$ $$=x^2+3x-5x-15$$ $$=x^2-2x-15$$
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: 21
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