What is the integral of-4xe^{2x^2} ?

The integral of-4xe^{2x^2} is -e^{2x^2}+C

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integral of-4xe^{2x^2}

\int - 4 x e^{2 x^{2}} d x

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

Solution steps

\int - 4 x e^{2 x^{2}} d x

Take the constant out:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= - 4 \cdot \int x e^{2 x^{2}} d x

Apply u-substitution

= - 4 \cdot \int \frac{e ^{u}}{4} d u

Take the constant out:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= - 4 \cdot \frac{1}{4} \cdot \int e^{u} d u

Use the common integral:

\int e^{u} d u = e^{u}

= - 4 \cdot \frac{1}{4} e^{u}

Substitute back

u = 2 x^{2}

= - 4 \cdot \frac{1}{4} e^{2 x^{2}}

Simplify

- 4 \cdot \frac{1}{4} e^{2 x^{2}} : - e^{2 x^{2}}

= - e^{2 x^{2}}

Add a constant to the solution

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