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 - 2.1 Operations with Matrices - 2.1 Exercises - Page 49: 37

Answer

$E-2A$ is not defined. Because $A$ and $E$ have different sizes. Namely, the size of $A$ is $3\times 4$ and the size of $E$ is $4\times 3$.

Work Step by Step

$E-2A$ is not defined. Because $A$ and $E$ have different sizes. Namely, the size of $A$ is $3\times 4$ and the size of $E$ is $4\times 3$.
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