Answer
$5x^2-16$
Work Step by Step
Shaded area = Larger figure - smaller figure
Larger figure
$= (3x+4) \times (3x-4)$
$= 9x^2-16$
Smaller figure
$=x \times x$
$=x^2$
Four smaller figures
$=4x^2$
$(9x^2-16)-(4x^2)$
$=5x^2-16$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 5 - Section 5.6 - Special Products - Exercise Set - Page 389: 98
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