So i have the following question(adsbygoogle = window.adsbygoogle || []).push({});

a) Show that if AB and BA are both defined, then AB and BA are square matrices..

this is what i tried doing..

If AB and BA are both tdefined then

A=[n x p ] matrix

B=[p x l ] matrix

AB=[nxl] matrix

IF and only IF l=n, then BA will be defined.

then BA=[p x p] matrix

and

AB=[l x l] matrix

then by definition both AB and BA will be square matrices..

is this correct? i think it is wrong.

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# Homework Help: Question about square matrix

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