Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 11 - Test: 9

Answer

x = 1 x= -1

Work Step by Step

$x^{6}$ + 1 = $x^{4}$ + $x^{2}$ $x^{6}$ - $x^{4}$ = $x^{2}$ - 1 $x^{4}$($x^{2}$ -1) = $x^{2}$ - 1 $x^{4}$ = 1 Thus, x is either 1 or -1
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