1. The problem statement, all variables and given/known data Let x and y be independent random variables with E[x]=1, E[y]=-1, var[x]=1/2, var[y]=2 Calculate E[(x+1)2(y-1)2] 2. Relevant equations E[x]=1=μ E[y]=-1=μ var[x]=1/2 =E[(x-μ)2] var[y]=2=E[(x-μ)2] 3. The attempt at a solution Since x and y are independent, E[(x+1)2(y-1)2]=E[(x+1)2]*E[(y-1)2] var[x]=1/2=E[(x-1)2] var[y]=2=E[(y+1)2 The signs in the equation I need to solve are throwing me off. I feel like I'm missing something simple. Any help is appreciated!