Matrix multiplication, specifically elimination matrices.

AJBMuir
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I was wondering if anybody can see where I have gone wrong here?
I was given the rule, E2(E1A1)=(E2E1)A1, I can't seem to find my mistake.
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Hi AJBMuir! :smile:
AJBMuir said:
I was wondering if anybody can see where I have gone wrong here?
I was given the rule, E2(E1A1)=(E2E1)A1, I can't seem to find my mistake.View attachment 60702

Your (E2E1)A is wrong …

eg the top-right should be 4 -2 + 2 :wink:
 
tiny-tim said:
Hi AJBMuir! :smile:Your (E2E1)A is wrong …

eg the top-right should be 4 -2 + 2 :wink:

Cheers, I have no idea how I missed that!
 

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