Answer
We can not compute the given expression.
Work Step by Step
Since A is a $2 \times 4$ matrix, then $A^2=AA$ is not a defined matrix. Hence, we can not compute the given expression.
Differential Equations and Linear Algebra (4th Edition)
by Goode, Stephen W.; Annin, Scott A.
Published by
Pearson
ISBN 10:
0-32196-467-5
ISBN 13:
978-0-32196-467-0
Chapter 2 - Matrices and Systems of Linear Equations - 2.9 Chapter Review - Additional Problems - Page 192: 3
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