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How do you prove ab equals ba?

Updated: 4/28/2022
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Wiki User

14y ago

Best Answer

A - B = B - A

This statement is very difficult to prove.

Mainly because it's not true . . . unless 'A' happens to equal 'B'.

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14y ago
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Wiki User

14y ago

You cannot prove it since it is axiomatic. You can get consistent theories (matrix algebra, for example) where ab is not ba.

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