Why is Mathematica giving an error when trying to plot xe^{-x}?

[flyingpig]

Homework Statement

I am trying to plot $$xe^{-x}$$ by using Plot[x*e^(-x), {x, 0, 5}] and it keeps telling me that

Plot::exclul: must be a list of equalities or real-valued functions.

So I tried

Plot[x*e^(-x), {x, 0, 5}, PlotRange -> {-10, 10}]

Still not working

The Attempt at a Solution

 

[ihggin]

Try using 'Exp[-x]' for the exponential rather than 'e^(-x)'.