Answer
$$\begin{bmatrix} -6&0&15 \\ -12 &-21 &9 \end{bmatrix}$$
Work Step by Step
Using the distributive property for matrices, we find:
$$\begin{bmatrix} -6&0&15 \\ -12 &-21 &9 \end{bmatrix}$$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 3 Linear Systems and Matrices - 3.5 Perform Basic Matrix Operations - 3.5 Exercises - Skill Practice - Page 191: 11
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