What is the integral from 0 to 1 of x^2sqrt(x+1) ?

The integral from 0 to 1 of x^2sqrt(x+1) is (44sqrt(2)-16)/(105)

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integral from 0 to 1 of x^2sqrt(x+1)

\int_{0}^{1} x^{2} x + 1 d x

\frac{44 2 - 16}{105}

Decimal

0.44024 \dots

Solution steps

\int_{0}^{1} x^{2} x + 1 d x

Apply u-substitution

: \int_{1}^{2} (u - 1)^{2} u d u

= \int_{1}^{2} (u - 1)^{2} u d u

Expand

(u - 1)^{2} u : u^{\frac{5}{2}} - 2 u^{\frac{3}{2}} + u

= \int_{1}^{2} u^{\frac{5}{2}} - 2 u^{\frac{3}{2}} + u d u

Apply the Sum Rule:

\int f (x) \pm g (x) d x = \int f (x) d x \pm \int g (x) d x

= \int_{1}^{2} u^{\frac{5}{2}} d u - \int_{1}^{2} 2 u^{\frac{3}{2}} d u + \int_{1}^{2} u d u

\int_{1}^{2} u^{\frac{5}{2}} d u = \frac{16 2 - 2}{7}

\int_{1}^{2} 2 u^{\frac{3}{2}} d u = \frac{2 ( 8 2 - 2 )}{5}

\int_{1}^{2} u d u = \frac{4 2 - 2}{3}

= \frac{16 2 - 2}{7} - \frac{2 ( 8 2 - 2 )}{5} + \frac{4 2 - 2}{3}

Simplify

\frac{16 2 - 2}{7} - \frac{2 ( 8 2 - 2 )}{5} + \frac{4 2 - 2}{3} : \frac{44 2 - 16}{105}

= \frac{44 2 - 16}{105}

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What is the integral from 0 to 1 of x^2sqrt(x+1) ?
The integral from 0 to 1 of x^2sqrt(x+1) is (44sqrt(2)-16)/(105)