Algebra Examples

$\int (5 x^{4} + 8 x^{3} + 9 x^{2} + 4 x + 3) d x$

Step 1

Remove parentheses.

$\int 5 x^{4} + 8 x^{3} + 9 x^{2} + 4 x + 3 d x$

Step 2

Split the single integral into multiple integrals.

$\int 5 x^{4} d x + \int 8 x^{3} d x + \int 9 x^{2} d x + \int 4 x d x + \int 3 d x$

Step 3

Since $5$ is constant with respect to $x$ , move $5$ out of the integral.

$5 \int x^{4} d x + \int 8 x^{3} d x + \int 9 x^{2} d x + \int 4 x d x + \int 3 d x$

Step 4

By the Power Rule, the integral of $x^{4}$ with respect to $x$ is $\frac{1}{5} x^{5}$ .

$5 (\frac{1}{5} x^{5} + C) + \int 8 x^{3} d x + \int 9 x^{2} d x + \int 4 x d x + \int 3 d x$

Step 5

Since $8$ is constant with respect to $x$ , move $8$ out of the integral.

$5 (\frac{1}{5} x^{5} + C) + 8 \int x^{3} d x + \int 9 x^{2} d x + \int 4 x d x + \int 3 d x$

Step 6

By the Power Rule, the integral of $x^{3}$ with respect to $x$ is $\frac{1}{4} x^{4}$ .

$5 (\frac{1}{5} x^{5} + C) + 8 (\frac{1}{4} x^{4} + C) + \int 9 x^{2} d x + \int 4 x d x + \int 3 d x$

Step 7

Since $9$ is constant with respect to $x$ , move $9$ out of the integral.

$5 (\frac{1}{5} x^{5} + C) + 8 (\frac{1}{4} x^{4} + C) + 9 \int x^{2} d x + \int 4 x d x + \int 3 d x$

Step 8

By the Power Rule, the integral of $x^{2}$ with respect to $x$ is $\frac{1}{3} x^{3}$ .

$5 (\frac{1}{5} x^{5} + C) + 8 (\frac{1}{4} x^{4} + C) + 9 (\frac{1}{3} x^{3} + C) + \int 4 x d x + \int 3 d x$

Step 9

Since $4$ is constant with respect to $x$ , move $4$ out of the integral.

$5 (\frac{1}{5} x^{5} + C) + 8 (\frac{1}{4} x^{4} + C) + 9 (\frac{1}{3} x^{3} + C) + 4 \int x d x + \int 3 d x$

Step 10

By the Power Rule, the integral of $x$ with respect to $x$ is $\frac{1}{2} x^{2}$ .

$5 (\frac{1}{5} x^{5} + C) + 8 (\frac{1}{4} x^{4} + C) + 9 (\frac{1}{3} x^{3} + C) + 4 (\frac{1}{2} x^{2} + C) + \int 3 d x$

Step 11

Apply the constant rule.

$5 (\frac{1}{5} x^{5} + C) + 8 (\frac{1}{4} x^{4} + C) + 9 (\frac{1}{3} x^{3} + C) + 4 (\frac{1}{2} x^{2} + C) + 3 x + C$

Step 12

Simplify.

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Step 12.1

Simplify.

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Step 12.1.1

Combine $\frac{1}{5}$ and $x^{5}$ .

$5 (\frac{x^{5}}{5} + C) + 8 (\frac{1}{4} x^{4} + C) + 9 (\frac{1}{3} x^{3} + C) + 4 (\frac{1}{2} x^{2} + C) + 3 x + C$

Step 12.1.2

Combine $\frac{1}{4}$ and $x^{4}$ .

$5 (\frac{x^{5}}{5} + C) + 8 (\frac{x^{4}}{4} + C) + 9 (\frac{1}{3} x^{3} + C) + 4 (\frac{1}{2} x^{2} + C) + 3 x + C$

Step 12.1.3

Combine $\frac{1}{3}$ and $x^{3}$ .

$5 (\frac{x^{5}}{5} + C) + 8 (\frac{x^{4}}{4} + C) + 9 (\frac{x^{3}}{3} + C) + 4 (\frac{1}{2} x^{2} + C) + 3 x + C$

Step 12.1.4

Combine $\frac{1}{2}$ and $x^{2}$ .

$5 (\frac{x^{5}}{5} + C) + 8 (\frac{x^{4}}{4} + C) + 9 (\frac{x^{3}}{3} + C) + 4 (\frac{x^{2}}{2} + C) + 3 x + C$

Step 12.2

Simplify.

$x^{5} + 2 x^{4} + 3 x^{3} + 2 x^{2} + 3 x + C$