Answer
$x^4-625$
Work Step by Step
Using special products, the given expression is equivalent to
\begin{align*}
&
(x-5)(x+5)(x^2+25)
\\\\&=
(x^2-25)(x^2+25)
\\\\&=
(x^2)^2-25^2
\\\\&=
x^4-625
.\end{align*}
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 5 - Section 5.4 - Multiplying Polynomials - Exercise Set - Page 289: 49
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