Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 11 - Systems of Equations and Inequalities - Chapter Review - Chapter Test - Page 796: 9



Work Step by Step

We are given the matrices: $B=\begin{bmatrix}1&-2&5\\0&3&1\end{bmatrix},C=\begin{bmatrix}4&6\\1&-3\\-1&8\end{bmatrix}$ Compute $CB$: $CB=\begin{bmatrix}4&6\\1&-3\\-1&8\end{bmatrix}\begin{bmatrix}1&-2&5\\0&3&1\end{bmatrix}$ $=\begin{bmatrix}4(1)+6(0)&4(-2)+6(3)&4(5)+6(1)\\1(1)+(-3)(0)&1(-2)+(-3)(3)&1(5)+(-3)(1)\\-1(1)+8(0)&-1(-2)+8(3)&-1(5)+8(1)\end{bmatrix}$ $=\begin{bmatrix}4&10&25\\1&-11&2\\-1&26&3\end{bmatrix}$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.