Answer
$$W=0.$$
Work Step by Step
$$W=\left| \begin {array}{ccc} 1&x&2+x\\ 0&1&1
\\ 0&0&0\end {array}
\right|=0.
$$
Elementary Linear Algebra 7th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
1-13311-087-8
ISBN 13:
978-1-13311-087-3
Chapter 4 - Vector Spaces - Review Exercises - Page 223: 92
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