I had a question regarding subspaces.(adsbygoogle = window.adsbygoogle || []).push({});

Given vectors [tex](a,b,c,d)[/tex] s.t. [tex]\left{\mid}\begin{array}{cc}a&b\\c&d\end{array}\right{\mid}=0[/tex]

a supspace of [tex]\Re^4[/tex]?

Though i kno the answer is yes, but i dont understand like it looks to me that it uses one of the three properties of subspaces; the zero vector one i m guessing. But could someone plz explain this to me?

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# Three properties of subspaces

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