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

The integral of (x^3+x)^2 is (x^7)/7+(2x^5)/5+(x^3)/3+C

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

integral of (x^3+x)^2

\int (x^{3} + x)^{2} d x

\frac{x ^{7}}{7} + \frac{2 x ^{5}}{5} + \frac{x ^{3}}{3} + C

Solution steps

\int (x^{3} + x)^{2} d x

Expand

(x^{3} + x)^{2} : x^{6} + 2 x^{4} + x^{2}

= \int x^{6} + 2 x^{4} + x^{2} d x

Apply the Sum Rule:

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

= \int x^{6} d x + \int 2 x^{4} d x + \int x^{2} d x

\int x^{6} d x = \frac{x ^{7}}{7}

\int 2 x^{4} d x = \frac{2 x ^{5}}{5}

\int x^{2} d x = \frac{x ^{3}}{3}

= \frac{x ^{7}}{7} + \frac{2 x ^{5}}{5} + \frac{x ^{3}}{3}

Add a constant to the solution

= \frac{x ^{7}}{7} + \frac{2 x ^{5}}{5} + \frac{x ^{3}}{3} + C

What is the integral of (x^3+x)^2 ?
The integral of (x^3+x)^2 is (x^7)/7+(2x^5)/5+(x^3)/3+C