Elementary Linear Algebra 7th Edition

Published by Cengage Learning
ISBN 10: 1-13311-087-8
ISBN 13: 978-1-13311-087-3

Chapter 2 - Matrices - Review Exercises - Page 98: 30


$A$ is nonsingular whenever $x\neq 8$.

Work Step by Step

$A$ is singular if $$ad-bc=0 \Longrightarrow 8-x=0\Longrightarrow x=8. $$ Then $A$ is nonsingular whenever $x\neq 8$.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.