If XXX and YYY are independent random variables with Var(X)=2Var(X) = 2Var(X)=2 and Var(Y)=3Var(Y) = 3Var(Y)=3, what is Cov(X+Y,X−Y)Cov(X+Y, X-Y)Cov(X+Y,X−Y)?
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