Indefinite integral ∫ Xe ^ (- 2x) DX,

The original formula = (- 1 / 2) * ∫ XD (e ^ (- 2x)) = (- 1 / 2) * [Xe ^ (- 2x) -∫ e ^ (- 2x) DX = (- 1 / 2) * Xe ^ (- 2x) + (1 / 2) * (- 1 / 2) * e ^ (- 2x) + C
=(-1/2)*xe^(-2x)-(1/4)e^(-2x)+c

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