Find the dimension of the subspace of M2;2 consisting of all 2 by 2 matrices(adsbygoogle = window.adsbygoogle || []).push({});

whose diagonal entries are zero. ?

i know that the dimension is the number of vectors that are the basis for this subspace ,but i cannot figure out what is the basis for this subspace ?

any help will be appreciated ,

thanks in advance

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# Dimension of a subspace

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