evaluate the integral using integration by parts

Question

7xe^-x

Answer 1

u = 7x
du = 7 dx

dv = e^-x dx
v = -e^-x

∫u dv = uv - ∫v du
∫7xe^-x dx = -7xe^-x + 7∫e^-x dx

I think you can take it from there, no?