Given the matrix A = 9 -1 2 -18 and B =-5 -3 -2 -4 . Find (a) AB ( 3 marks) (b) A – 2B ( 3 marks) (c) AT

Elementary Linear Algebra (MindTap Course List)
8th Edition
ISBN:9781305658004
Author:Ron Larson
Publisher:Ron Larson
Chapter3: Determinants
Section3.CM: Cumulative Review
Problem 9CM: Solve for x and y in the matrix equation 2AB=I, given A=[1123] and B=[x2y5].
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Given the matrix A = 9 -1

2 -18
and B =-5 -3

-2 -4
. Find
(a) AB ( 3 marks)
(b) A – 2B ( 3 marks)
(c) AT

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