I'm sorry for the stupid question, can you help to understand how to move from the first row to the second one, which property of linear algebra has been used?
2026-04-03 16:09:44.1775232584
Linear algebra - computation with matrices
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Community wiki answer so the question can be marked as answered:
As noted in a comment, the first line uses the fact that the inverse of a product is the product of the inverses in reverse order, $(ABC)^{-1}=C^{-1}B^{-1}A^{-1}$ (which you can check by multiplying it out).