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July 12th, 2009, 09:03 AM   #1
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find a matrix

A=(-1 2 2 )
(2 2 -1)
Find a matrix B belegs to M3,2 (Q) so that AB = O2 (B is not 0).
All help appreciated.
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July 12th, 2009, 02:36 PM   #2
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Re: find a matrix

B=(-2b1,-2b2; b1,b2;-2b1,-2b2)

That's how I figured it out.
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