Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 8 - Review Exercises - Page 617: 48


(a) $u+v=i-5j$ (b) $u-v=-i-7j$ (c) $4u=-24j$ (d) $3v+5u=3i-27j$

Work Step by Step

(a) $u+v=(-6j)+(i+j)=i+(-6+1)j=i-5j$ (b) $u-v=(-6j)-(i+j)=-i+(-6-1)j=-i-7j$ (c) $4u=4(-6j)=-24j$ (d) $3v+5u=3(i+j)+5(-6j)=3i+3j-30j=3i-27j$
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