If A-1 = 3 3 -9 -12 , then the a2,1 entry of the matrix A is

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter6: Matrices And Determinants
Section6.2: The Algebra Of Matrices
Problem 1E: We can add (or subtract) two matrices only if they have the same ______.
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If A-1
=
3
3
-9
-12
,
then the a2,1 entry of the matrix A is
Transcribed Image Text:If A-1 = 3 3 -9 -12 , then the a2,1 entry of the matrix A is
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