Answer
$$6-2\sqrt{5}$$
Work Step by Step
Plugging in $1-\sqrt{5}$ for $x$, we find:
$$ \left(1-\sqrt{5}\right)^2\\ 1^2-2\cdot \:1\cdot \sqrt{5}+\left(\sqrt{5}\right)^2\\ 6-2\sqrt{5}$$
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 1-10 - Cumulative Review - Page 696: 30
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