Answer
$A=6x+22$
Work Step by Step
$A=(x+9)(x+3)-(x+5)(x+1)=x^2+12x+27-(x^2+6x+5)=6x+22$
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter P - Section P.4 - Polynomials - Exercise Set - Page 57: 95
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