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Mathematics 7 Online
OpenStudy (anonymous):

In general, matrix multiplication is not commutative. Show by counterexample that this is true. Then give an example of when matrix multiplication is commutative. Explain.

OpenStudy (anonymous):

@Mertsj Please help!

OpenStudy (mertsj):

Yes. You could multiply those and then switch the order, multiply again and show that the results are not the same and therefore matrix multiplication is not commutative.

OpenStudy (anonymous):

So how about disproving it?

OpenStudy (anonymous):

When would the commutative property work?

OpenStudy (mertsj):

You can't disprove something that is true.

OpenStudy (mertsj):

When you are multiplying two inverse matrices.

OpenStudy (anonymous):

Or wait, so there is no example that shows marix multiplication is commutative?

OpenStudy (mertsj):

I don't think think those two are inverses.

OpenStudy (mertsj):

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