Answer
$x^4+4x^3+4x^2-16$
Work Step by Step
$(x^2+2x+4)(x^2+2x-4)$
$x^2(x^2+2x-4)+2x(x^2+2x-4)+4(x^2+2x-4)$
$(x^4+2x^3-4x^2)+(2x^3+4x^2-8x)+(4x^2+8x-16)$
$x^4+4x^3+4x^2-16$
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 - Review - Page 406: 97
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