Algebra 2 Common Core

Published by Prentice Hall
ISBN 10: 0133186024
ISBN 13: 978-0-13318-602-4

Chapter 12 - Matrices - Get Ready! - Page 761: 5



Work Step by Step

The first subscript identifies the row number and the second subscript identifies the column number, so $a_{23}$ is the element of A in the second row and third column: $$a_{23}=-9$$
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