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February 8th, 2009, 01:28 AM   #1
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Is my answer the correct one?

Hi,

I'm wondering if my answer is the correct one or not.
If it is not correct can you help to find the right one.

This is the example:
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May 26th, 2009, 05:15 AM   #2
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It's incorrect. Consider more carefully what "+ 4" and "+ 1" should mean when applied to a matrix. Also, you gave the wrong sign to one of your figures.
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