1. ## Square matrices question.

WAAAAY confused.

True or false? for any square Matrice A and B, (A+B)(A-B)= AA-BB

any ideas on this mind boggler?

2. true as long as $A$ and $B$ commute.

3. Can you explain to me what that means please?

4. Originally Posted by Danktoker
Can you explain to me what that means please?
It means if $A\times B = B \times A$

5. :O

oh i c...

Thank you very much