Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 11 - Cumulative Test for Chapters 9-11 - Page 844: 14

Answer

$2A-5B=\begin{bmatrix} 8 & -19 \\ 12 & 9 \end{bmatrix}$

Work Step by Step

$2A-5B=2\begin{bmatrix} -1 & 3 \\ 6 & 2 \end{bmatrix}-5\begin{bmatrix} -2 & 5 \\ 0 & -1 \end{bmatrix}=\begin{bmatrix} -2 & 6 \\ 12 & 4 \end{bmatrix}+\begin{bmatrix} 10 & -25 \\ 0 & 5 \end{bmatrix}=\begin{bmatrix} -2+10 & 6-25 \\ 12+0 & 4+5 \end{bmatrix}=\begin{bmatrix} 8 & -19 \\ 12 & 9 \end{bmatrix}$
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