Differential Equations and Linear Algebra (4th Edition)

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: 7

Answer

$\begin{pmatrix} -24 & 48 & 24 & 72\\ 24 & -24 & -56 & -48\\ -4 &-28 & 52 & -24\\ 4 & 4 & -20 & 0 \end{pmatrix}$

Work Step by Step

$-4B=\begin{pmatrix} 12 & 0\\ -8 & -8\\ -4 & 12\\ 0 & -4 \end{pmatrix}$ $(-4B)A=\begin{pmatrix} -24 & 48 & 24 & 72\\ 24 & -24 & -56 & -48\\ -4 &-28 & 52 & -24\\ 4 & 4 & -20 & 0 \end{pmatrix}$
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