Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 10 - Section 10.3 - Matrices and Systems of Linear Equations - 10.3 Exercises - Page 710: 21

Answer

$\left[\begin{array}{llll} -1 & 1 & 2 & 0\\ 0 & 4 & 7 & 4\\ 1 & -2 & -1 & -1 \end{array}\right]$

Work Step by Step

$\left[\begin{array}{llll} -1 & 1 & 2 & 0\\ 3+3(-1) & 1+3(1) & 1+3(2) & 4+3(0)\\ 1 & -2 & -1 & -1 \end{array}\right]$ $\left[\begin{array}{llll} -1 & 1 & 2 & 0\\ 0 & 4 & 7 & 4\\ 1 & -2 & -1 & -1 \end{array}\right]$
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