Problem 1: Consider the following two square matrices A=[2345],  B=[5−32−6] Find A + B and A-2B Find the products AB and BA. Is AB = BA, why or why not? Is A a singular matrix, why or why not?

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter5: Orthogonality
Section5.3: The Gram-schmidt Process And The Qr Factorization
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Problem 1: Consider the following two square matrices

A=[2345],  B=[5−32−6]

  1. Find A + B and A-2B
  2. Find the products AB and BA. Is AB = BA, why or why not?
  3. Is A a singular matrix, why or why not?

Problem 2:  Find the determinant of A, that is |A|, if 
A=⎡⎢⎣230−15−3042⎤⎥⎦

Problem 3:  Find the determinant of AT, that is |AT|, using Matrix A defined in problem 2 above
Problem 4:  Find the inverse of a 2 X 2 matrix  B defined in problem 1 above

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