Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 9 - Systems and Matrices - 9.2 Matrix Solution of Linear Systems - 9.2 Exercises: 7

Answer

$\left[\begin{array}{ll} 1 & 4\\ 0 & -9 \end{array}\right]$

Work Step by Step

$\left[\begin{array}{ll} 1 & 4\\ 4+1(-4) & 7+4(-4) \end{array}\right]=\left[\begin{array}{ll} 1 & 4\\ 0 & -9 \end{array}\right]$
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.