Answer
$A=4x+10$
Work Step by Step
$A=(x+4)(x+3)-(x+2)(x+1)=(x^2+7x+12)-(x^2+3x+2)=4x+10$
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: 96
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