Question: S : {A E M3(R) :trace(A) : U} is a subspace. Find a basis for the above space and deduce its dimension

S : {A E M3(R) :trace(A) : U} is a subspace. Find
S : {A E M3(R) :trace(A) : U} is a subspace. Find a basis for the above space and deduce its dimension

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