Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
Prueba: Var(X+Y) = Var(X) + Var(Y) + 2Cov(X,Y)
Prueba: Var(X+Y) = Var(X) + Var(Y) + 2Cov(X,Y)
Natural Language
Math Input
Extended Keyboard
