How can I simplify Matrix Inversion

[ppal]

How can I further simplify to display less cluttered output.

[LucMeekes]

Try undefining  a before the symbolic operation.

With a known to the symbolic processor, any symbolic operation will never result in an expression containing a itself, but use its definition instead.

Success!

Luc

[LucMeekes · Accepted solution]

No, that doesn't work, you'll get something like:

So:

I wouldn't know of a way to get the 1/3 before the matrix.

However in all cases you should realize that it is very hard to drive the results of the symbolic processor in any direction.

Success!
Luc

[ppal]

LucMeekes‌ Close enough!