What is the integral of (x^2+2x)e^x ?

The integral of (x^2+2x)e^x is e^xx^2+C

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integral of (x^2+2x)e^x

\int (x^{2} + 2 x) e^{x} d x

e^{x} x^{2} + C

Solution steps

\int (x^{2} + 2 x) e^{x} d x

Apply Integration By Parts

: (x^{2} + 2 x) e^{x} - \int (2 x + 2) e^{x} d x

= (x^{2} + 2 x) e^{x} - \int (2 x + 2) e^{x} d x

\int (2 x + 2) e^{x} d x = 2 e^{x} x

= (x^{2} + 2 x) e^{x} - 2 e^{x} x

Simplify

(x^{2} + 2 x) e^{x} - 2 e^{x} x : e^{x} x^{2}

= e^{x} x^{2}

Add a constant to the solution

= e^{x} x^{2} + C

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