Answer
$\left[\begin{array}{ll}
1 & 4\\
0 & -9
\end{array}\right]$
Work Step by Step
$\left[\begin{array}{ll}
1 & 4\\
4+1(-4) & 7+4(-4)
\end{array}\right]=\left[\begin{array}{ll}
1 & 4\\
0 & -9
\end{array}\right]$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 9 - Systems and Matrices - 9.2 Matrix Solution of Linear Systems - 9.2 Exercises - Page 870: 7
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