What is the integral of xsqrt(6x^2+3) ?

The integral of xsqrt(6x^2+3) is 1/18 (6x^2+3)^{3/2}+C

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integral of xsqrt(6x^2+3)

\int x 6 x^{2} + 3 d x

\frac{1}{18} (6 x^{2} + 3)^{\frac{3}{2}} + C

Solution steps

\int x 6 x^{2} + 3 d x

Apply u-substitution

= \int \frac{u}{12} d u

Take the constant out:

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

= \frac{1}{12} \cdot \int u d u

Apply the Power Rule

= \frac{1}{12} \cdot \frac{2}{3} u^{\frac{3}{2}}

Substitute back

u = 6 x^{2} + 3

= \frac{1}{12} \cdot \frac{2}{3} (6 x^{2} + 3)^{\frac{3}{2}}

Simplify

\frac{1}{12} \cdot \frac{2}{3} (6 x^{2} + 3)^{\frac{3}{2}} : \frac{1}{18} (6 x^{2} + 3)^{\frac{3}{2}}

= \frac{1}{18} (6 x^{2} + 3)^{\frac{3}{2}}

Add a constant to the solution

= \frac{1}{18} (6 x^{2} + 3)^{\frac{3}{2}} + C

What is the integral of xsqrt(6x^2+3) ?
The integral of xsqrt(6x^2+3) is 1/18 (6x^2+3)^{3/2}+C