I know that for matrices A, B and C is correct to write: (AB)C=A(BC)(adsbygoogle = window.adsbygoogle || []).push({});

Also [tex](BA)^{-1}=A^{-1}B^{-1}[/tex]

Why [tex] (A^{T}A)^{-1}A^{T}=A^{-1}(A^{T})^{-1}A^{T}=A^{-1}[/tex] is not correct?

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# Homework Help: Is this correct about matrices

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