Question: "shortcut" notation for matlab matrix solution

Does anyone know the difference between the standard inv(A)*b to solve A*x=B linear system vs. the A\b usage by Matlab?  I believe they are different in method.

I can correctly solve with MatrixInverse(A).b for x but was wondering the differences, accuracy and overall shortcut command versus typing the full MatrixInverse function.

Just trying to improve my portability knowledge.    

Thanks in Advance,

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