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February 12th, 2013, 12:27 PM  #1 
Newbie Joined: Feb 2013 Posts: 2 Thanks: 0  Find matrix M such that AM=B
Find matrix M such that AM=B when A = 1 2 3 2 1 7 2 2 7 B = 0 0 1 1 0 1 0 1 1 0 1 0 I think side by side Gaussian Elimination is used somehow. 
February 12th, 2013, 12:50 PM  #2 
Member Joined: Jan 2013 Posts: 93 Thanks: 0  Re: Find matrix M such that AM=B
Can you compute and multiply on the left by that?

February 12th, 2013, 01:04 PM  #3 
Newbie Joined: Feb 2013 Posts: 2 Thanks: 0  Re: Find matrix M such that AM=B
Yeah thanks

February 12th, 2013, 02:07 PM  #4  
Math Team Joined: Dec 2006 From: Lexington, MA Posts: 3,267 Thanks: 408  Re: Find matrix M such that AM=B Hello, imhotep! Crimson Sunbird has the best game plan. Did you try it? Quote:
 
February 15th, 2013, 12:16 PM  #5 
Math Team Joined: Sep 2007 Posts: 2,409 Thanks: 6  Re: Find matrix M such that AM=B
Same idea but a little faster: Replace the identity matrix on the left by the matrix B: and do the row operations, as Soroban shows, to reduce the matrix, A, to the identity while applying those same row operations to the matrix, B. 

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