Answer
$\begin{bmatrix}
9&2\\
4&1
\end{bmatrix}$
Work Step by Step
Matrix A is the inverse of the change of coordinate matrix from B to the standard basis: $\begin{bmatrix}
9&2\\
4&1
\end{bmatrix}$
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 4 - Vector Spaces - 4.4 Exercises - Page 225: 21
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