Answer
$2-3\sqrt 2$
It is a scalar.
Work Step by Step
$2-||u||=2-\sqrt {u⋅u}=2-\sqrt {⟨3,3⟩⋅⟨3,3⟩}=2-\sqrt {3(3)+3(3)}=2-\sqrt {18}=2-3\sqrt 2$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 8 - 8.4 - Vectors and Dot Products - 8.4 Exercises - Page 595: 20
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