Calculate Energy of Signal x(t) = e(-2t) * u(t)

[drkidd22]

Homework Statement

x(t) = e^(-2t) * u(t)

Ex = x²(t) dt

Attached is the work I have done. Got stuck towards the end.

 

[xcvxcvvc]

$$(e^{-2x})^2 = e^{-2x}e^{-2x}=e^{-2x-2x}=e^{-4x}$$
or you can use the power property associated with exponents and instantly say
$$(e^{-2x})^2=e^{2(-2x)}=e^{-4x}$$
I'm assuming the exponential being squared is what messed you up, and I'm assuming you can take it from here.