Answer
$x^{4}-25$
Work Step by Step
$(x^{2}+5)(x^{2}-5)$
Perform this product applying the following formula:
$(a+b)(a-b)=a^{2}-b^{2}$
Here, $a=x^{2}$ and $b=5$
$(x^{2}+5)(x^{2}-5)=(x^{2})^{2}-(5)^{2}=x^{4}-25$
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 388: 45
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