This textbook survival guide was created for the textbook: Linear Algebra with Applications, edition: 9. The answer to “Show that if A I O AT x r = b 0 then x is a least squares solution of the system Ax = b and r is the residual vector.” is broken down into a number of easy to follow steps, and 31 words. The full step-by-step solution to problem: 12 from chapter: 5.3 was answered by , our top Math solution expert on 03/15/18, 05:26PM. Since the solution to 12 from 5.3 chapter was answered, more than 215 students have viewed the full step-by-step answer. This full solution covers the following key subjects: . This expansive textbook survival guide covers 47 chapters, and 935 solutions. Linear Algebra with Applications was written by and is associated to the ISBN: 9780321962218.