Question

Hi..

Let x,y,z are RVS

Y=10+2*x+2.3*x2+11*z+11*z2+12.2*x*z

I am having mean and variances of x, x2, z, z2, xz…. How to calculate variance of y…any idea.

I wrote a small equation.. ..actually I am having a big equation. Can you give me a general form..


thanks