Answer
$(v·v)-(v·u)=44$
It is a scalar.
Work Step by Step
$(v·v)-(v·u)=(⟨5,1⟩⋅⟨5,1⟩)-(⟨5,1⟩⋅⟨-4,2⟩)=[5(5)+1(1)]-[5(-4)+1(2)]=(25+1)-(-20+2)=26-(-18)=26+18=44$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 8 - Review Exercises - Page 617: 80
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