Answer
$\vec{x}=\begin{bmatrix}
11\\
2\\
\end{bmatrix}$
Work Step by Step
$\vec{x}=-1\vec{b_1}+3\vec{b}_2=\begin{bmatrix}
2\\
-1\\
\end{bmatrix}
+\begin{bmatrix}
9\\
3\\
\end{bmatrix}=\begin{bmatrix}
11\\
2\\
\end{bmatrix}$
Linear Algebra and Its Applications (5th Edition)
by Lay, David C.; Lay, Steven R.; McDonald, Judi J.
Published by
Pearson
ISBN 10:
032198238X
ISBN 13:
978-0-32198-238-4
Chapter 2 - Matrix Algebra - 2.9 Exercises - Page 159: 2
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