Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Chapter 10 - Systems of Equations and Inequalities - Section 10.4 Matrix Algebra - 10.4 Assess Your Understanding - Page 776: 4

Answer

False

Work Step by Step

Let us consider as an example the matrices below: $A=\left[\begin{array}{ll} 1 & 0\\ 1 & 0 \end{array}\right],B=\left[\begin{array}{ll} 0 & 0\\ 1 & 1 \end{array}\right]$ Take their multiplication $AB=\left[\begin{array}{ll} 0 & 0\\ 0 & 0 \end{array}\right]$ and $BA=\left[\begin{array}{ll} 0 & 0\\ 2 & 0 \end{array}\right]$ We see that all corresponding entries of AB and BA are not equal, so $AB\neq BA$. This means that the multiplication of matrices is not commutative. Thus, the statement is false.
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.