Calculus Examples

$f (x) = - \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}}$

Step 1

Find the first derivative of the function.

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Step 1.1

Differentiate using the Product Rule which states that $\frac{d}{d x} [f (x) g (x)]$ is $f (x) \frac{d}{d x} [g (x)] + g (x) \frac{d}{d x} [f (x)]$ where $f (x) = - 1$ and $g (x) = \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}}$ .

$- \frac{d}{d x} [\frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}}] + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.2

Differentiate using the Quotient Rule which states that $\frac{d}{d x} [\frac{f (x)}{g (x)}]$ is $\frac{g (x) \frac{d}{d x} [f (x)] - f (x) \frac{d}{d x} [g (x)]}{{g (x)}^{2}}$ where $f (x) = 15 x^{2} + 10 x - 40$ and $g (x) = {(x^{2} + x + 3)}^{2}$ .

$- \frac{{(x^{2} + x + 3)}^{2} \frac{d}{d x} [15 x^{2} + 10 x - 40] - (15 x^{2} + 10 x - 40) \frac{d}{d x} [{(x^{2} + x + 3)}^{2}]}{{({(x^{2} + x + 3)}^{2})}^{2}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.3

Differentiate.

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Step 1.3.1

Multiply the exponents in ${({(x^{2} + x + 3)}^{2})}^{2}$ .

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Step 1.3.1.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$- \frac{{(x^{2} + x + 3)}^{2} \frac{d}{d x} [15 x^{2} + 10 x - 40] - (15 x^{2} + 10 x - 40) \frac{d}{d x} [{(x^{2} + x + 3)}^{2}]}{{(x^{2} + x + 3)}^{2 \cdot 2}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.3.1.2

Multiply $2$ by $2$ .

$- \frac{{(x^{2} + x + 3)}^{2} \frac{d}{d x} [15 x^{2} + 10 x - 40] - (15 x^{2} + 10 x - 40) \frac{d}{d x} [{(x^{2} + x + 3)}^{2}]}{{(x^{2} + x + 3)}^{4}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.3.2

By the Sum Rule, the derivative of $15 x^{2} + 10 x - 40$ with respect to $x$ is $\frac{d}{d x} [15 x^{2}] + \frac{d}{d x} [10 x] + \frac{d}{d x} [- 40]$ .

$- \frac{{(x^{2} + x + 3)}^{2} (\frac{d}{d x} [15 x^{2}] + \frac{d}{d x} [10 x] + \frac{d}{d x} [- 40]) - (15 x^{2} + 10 x - 40) \frac{d}{d x} [{(x^{2} + x + 3)}^{2}]}{{(x^{2} + x + 3)}^{4}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.3.3

Since $15$ is constant with respect to $x$ , the derivative of $15 x^{2}$ with respect to $x$ is $15 \frac{d}{d x} [x^{2}]$ .

$- \frac{{(x^{2} + x + 3)}^{2} (15 \frac{d}{d x} [x^{2}] + \frac{d}{d x} [10 x] + \frac{d}{d x} [- 40]) - (15 x^{2} + 10 x - 40) \frac{d}{d x} [{(x^{2} + x + 3)}^{2}]}{{(x^{2} + x + 3)}^{4}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.3.4

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 2$ .

$- \frac{{(x^{2} + x + 3)}^{2} (15 (2 x) + \frac{d}{d x} [10 x] + \frac{d}{d x} [- 40]) - (15 x^{2} + 10 x - 40) \frac{d}{d x} [{(x^{2} + x + 3)}^{2}]}{{(x^{2} + x + 3)}^{4}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.3.5

Multiply $2$ by $15$ .

$- \frac{{(x^{2} + x + 3)}^{2} (30 x + \frac{d}{d x} [10 x] + \frac{d}{d x} [- 40]) - (15 x^{2} + 10 x - 40) \frac{d}{d x} [{(x^{2} + x + 3)}^{2}]}{{(x^{2} + x + 3)}^{4}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.3.6

Since $10$ is constant with respect to $x$ , the derivative of $10 x$ with respect to $x$ is $10 \frac{d}{d x} [x]$ .

$- \frac{{(x^{2} + x + 3)}^{2} (30 x + 10 \frac{d}{d x} [x] + \frac{d}{d x} [- 40]) - (15 x^{2} + 10 x - 40) \frac{d}{d x} [{(x^{2} + x + 3)}^{2}]}{{(x^{2} + x + 3)}^{4}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.3.7

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 1$ .

$- \frac{{(x^{2} + x + 3)}^{2} (30 x + 10 \cdot 1 + \frac{d}{d x} [- 40]) - (15 x^{2} + 10 x - 40) \frac{d}{d x} [{(x^{2} + x + 3)}^{2}]}{{(x^{2} + x + 3)}^{4}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.3.8

Multiply $10$ by $1$ .

$- \frac{{(x^{2} + x + 3)}^{2} (30 x + 10 + \frac{d}{d x} [- 40]) - (15 x^{2} + 10 x - 40) \frac{d}{d x} [{(x^{2} + x + 3)}^{2}]}{{(x^{2} + x + 3)}^{4}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.3.9

Since $- 40$ is constant with respect to $x$ , the derivative of $- 40$ with respect to $x$ is $0$ .

$- \frac{{(x^{2} + x + 3)}^{2} (30 x + 10 + 0) - (15 x^{2} + 10 x - 40) \frac{d}{d x} [{(x^{2} + x + 3)}^{2}]}{{(x^{2} + x + 3)}^{4}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.3.10

Add $30 x + 10$ and $0$ .

$- \frac{{(x^{2} + x + 3)}^{2} (30 x + 10) - (15 x^{2} + 10 x - 40) \frac{d}{d x} [{(x^{2} + x + 3)}^{2}]}{{(x^{2} + x + 3)}^{4}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.4

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = x^{2}$ and $g (x) = x^{2} + x + 3$ .

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Step 1.4.1

To apply the Chain Rule, set $u$ as $x^{2} + x + 3$ .

$- \frac{{(x^{2} + x + 3)}^{2} (30 x + 10) - (15 x^{2} + 10 x - 40) (\frac{d}{d u} [u^{2}] \frac{d}{d x} [x^{2} + x + 3])}{{(x^{2} + x + 3)}^{4}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.4.2

Differentiate using the Power Rule which states that $\frac{d}{d u} [u^{n}]$ is $n u^{n - 1}$ where $n = 2$ .

$- \frac{{(x^{2} + x + 3)}^{2} (30 x + 10) - (15 x^{2} + 10 x - 40) (2 u \frac{d}{d x} [x^{2} + x + 3])}{{(x^{2} + x + 3)}^{4}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.4.3

Replace all occurrences of $u$ with $x^{2} + x + 3$ .

$- \frac{{(x^{2} + x + 3)}^{2} (30 x + 10) - (15 x^{2} + 10 x - 40) (2 (x^{2} + x + 3) \frac{d}{d x} [x^{2} + x + 3])}{{(x^{2} + x + 3)}^{4}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.5

Simplify with factoring out.

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Step 1.5.1

Multiply $2$ by $- 1$ .

$- \frac{{(x^{2} + x + 3)}^{2} (30 x + 10) - 2 (15 x^{2} + 10 x - 40) ((x^{2} + x + 3) \frac{d}{d x} [x^{2} + x + 3])}{{(x^{2} + x + 3)}^{4}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.5.2

Factor $x^{2} + x + 3$ out of ${(x^{2} + x + 3)}^{2} (30 x + 10) - 2 (15 x^{2} + 10 x - 40) ((x^{2} + x + 3) \frac{d}{d x} [x^{2} + x + 3])$ .

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Step 1.5.2.1

Factor $x^{2} + x + 3$ out of ${(x^{2} + x + 3)}^{2} (30 x + 10)$ .

$- \frac{(x^{2} + x + 3) ((x^{2} + x + 3) (30 x + 10)) - 2 (15 x^{2} + 10 x - 40) ((x^{2} + x + 3) \frac{d}{d x} [x^{2} + x + 3])}{{(x^{2} + x + 3)}^{4}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.5.2.2

Factor $x^{2} + x + 3$ out of $- 2 (15 x^{2} + 10 x - 40) ((x^{2} + x + 3) \frac{d}{d x} [x^{2} + x + 3])$ .

$- \frac{(x^{2} + x + 3) ((x^{2} + x + 3) (30 x + 10)) + (x^{2} + x + 3) (- 2 (15 x^{2} + 10 x - 40) (\frac{d}{d x} [x^{2} + x + 3]))}{{(x^{2} + x + 3)}^{4}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.5.2.3

Factor $x^{2} + x + 3$ out of $(x^{2} + x + 3) ((x^{2} + x + 3) (30 x + 10)) + (x^{2} + x + 3) (- 2 (15 x^{2} + 10 x - 40) (\frac{d}{d x} [x^{2} + x + 3]))$ .

$- \frac{(x^{2} + x + 3) ((x^{2} + x + 3) (30 x + 10) - 2 (15 x^{2} + 10 x - 40) (\frac{d}{d x} [x^{2} + x + 3]))}{{(x^{2} + x + 3)}^{4}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.6

Cancel the common factors.

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Step 1.6.1

Factor $x^{2} + x + 3$ out of ${(x^{2} + x + 3)}^{4}$ .

$- \frac{(x^{2} + x + 3) ((x^{2} + x + 3) (30 x + 10) - 2 (15 x^{2} + 10 x - 40) (\frac{d}{d x} [x^{2} + x + 3]))}{(x^{2} + x + 3) {(x^{2} + x + 3)}^{3}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.6.2

Cancel the common factor.

Step 1.6.3

Rewrite the expression.

$- \frac{(x^{2} + x + 3) (30 x + 10) - 2 (15 x^{2} + 10 x - 40) (\frac{d}{d x} [x^{2} + x + 3])}{{(x^{2} + x + 3)}^{3}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.7

By the Sum Rule, the derivative of $x^{2} + x + 3$ with respect to $x$ is $\frac{d}{d x} [x^{2}] + \frac{d}{d x} [x] + \frac{d}{d x} [3]$ .

$- \frac{(x^{2} + x + 3) (30 x + 10) - 2 (15 x^{2} + 10 x - 40) (\frac{d}{d x} [x^{2}] + \frac{d}{d x} [x] + \frac{d}{d x} [3])}{{(x^{2} + x + 3)}^{3}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.8

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 2$ .

$- \frac{(x^{2} + x + 3) (30 x + 10) - 2 (15 x^{2} + 10 x - 40) (2 x + \frac{d}{d x} [x] + \frac{d}{d x} [3])}{{(x^{2} + x + 3)}^{3}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.9

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 1$ .

$- \frac{(x^{2} + x + 3) (30 x + 10) - 2 (15 x^{2} + 10 x - 40) (2 x + 1 + \frac{d}{d x} [3])}{{(x^{2} + x + 3)}^{3}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.10

Since $3$ is constant with respect to $x$ , the derivative of $3$ with respect to $x$ is $0$ .

$- \frac{(x^{2} + x + 3) (30 x + 10) - 2 (15 x^{2} + 10 x - 40) (2 x + 1 + 0)}{{(x^{2} + x + 3)}^{3}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.11

Add $2 x + 1$ and $0$ .

$- \frac{(x^{2} + x + 3) (30 x + 10) - 2 (15 x^{2} + 10 x - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 1.12

Since $- 1$ is constant with respect to $x$ , the derivative of $- 1$ with respect to $x$ is $0$ .

$- \frac{(x^{2} + x + 3) (30 x + 10) - 2 (15 x^{2} + 10 x - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \cdot 0$

Step 1.13

Simplify the expression.

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Step 1.13.1

Multiply $\frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}}$ by $0$ .

$- \frac{(x^{2} + x + 3) (30 x + 10) - 2 (15 x^{2} + 10 x - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}} + 0$

Step 1.13.2

Add $- \frac{(x^{2} + x + 3) (30 x + 10) - 2 (15 x^{2} + 10 x - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$ and $0$ .

$- \frac{(x^{2} + x + 3) (30 x + 10) - 2 (15 x^{2} + 10 x - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14

Simplify.

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Step 1.14.1

Apply the distributive property.

$- \frac{(x^{2} + x + 3) (30 x + 10) + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2

Simplify the numerator.

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Step 1.14.2.1

Simplify each term.

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Step 1.14.2.1.1

Expand $(x^{2} + x + 3) (30 x + 10)$ by multiplying each term in the first expression by each term in the second expression.

$- \frac{x^{2} (30 x) + x^{2} \cdot 10 + x (30 x) + x \cdot 10 + 3 (30 x) + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.2

Simplify each term.

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Step 1.14.2.1.2.1

Rewrite using the commutative property of multiplication.

$- \frac{30 x^{2} x + x^{2} \cdot 10 + x (30 x) + x \cdot 10 + 3 (30 x) + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.2.2

Multiply $x^{2}$ by $x$ by adding the exponents.

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Step 1.14.2.1.2.2.1

Move $x$ .

$- \frac{30 (x \cdot x^{2}) + x^{2} \cdot 10 + x (30 x) + x \cdot 10 + 3 (30 x) + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.2.2.2

Multiply $x$ by $x^{2}$ .

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Step 1.14.2.1.2.2.2.1

Raise $x$ to the power of $1$ .

$- \frac{30 (x^{1} x^{2}) + x^{2} \cdot 10 + x (30 x) + x \cdot 10 + 3 (30 x) + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.2.2.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$- \frac{30 x^{1 + 2} + x^{2} \cdot 10 + x (30 x) + x \cdot 10 + 3 (30 x) + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.2.2.3

Add $1$ and $2$ .

$- \frac{30 x^{3} + x^{2} \cdot 10 + x (30 x) + x \cdot 10 + 3 (30 x) + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.2.3

Move $10$ to the left of $x^{2}$ .

$- \frac{30 x^{3} + 10 \cdot x^{2} + x (30 x) + x \cdot 10 + 3 (30 x) + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.2.4

Rewrite using the commutative property of multiplication.

$- \frac{30 x^{3} + 10 x^{2} + 30 x \cdot x + x \cdot 10 + 3 (30 x) + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.2.5

Multiply $x$ by $x$ by adding the exponents.

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Step 1.14.2.1.2.5.1

Move $x$ .

$- \frac{30 x^{3} + 10 x^{2} + 30 (x \cdot x) + x \cdot 10 + 3 (30 x) + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.2.5.2

Multiply $x$ by $x$ .

$- \frac{30 x^{3} + 10 x^{2} + 30 x^{2} + x \cdot 10 + 3 (30 x) + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.2.6

Move $10$ to the left of $x$ .

$- \frac{30 x^{3} + 10 x^{2} + 30 x^{2} + 10 \cdot x + 3 (30 x) + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.2.7

Multiply $30$ by $3$ .

$- \frac{30 x^{3} + 10 x^{2} + 30 x^{2} + 10 x + 90 x + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.2.8

Multiply $3$ by $10$ .

$- \frac{30 x^{3} + 10 x^{2} + 30 x^{2} + 10 x + 90 x + 30 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.3

Add $10 x^{2}$ and $30 x^{2}$ .

$- \frac{30 x^{3} + 40 x^{2} + 10 x + 90 x + 30 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.4

Add $10 x$ and $90 x$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.5

Simplify each term.

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Step 1.14.2.1.5.1

Multiply $15$ by $- 2$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 + (- 30 x^{2} - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.5.2

Multiply $10$ by $- 2$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 + (- 30 x^{2} - 20 x - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.5.3

Multiply $- 2$ by $- 40$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 + (- 30 x^{2} - 20 x + 80) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.6

Expand $(- 30 x^{2} - 20 x + 80) (2 x + 1)$ by multiplying each term in the first expression by each term in the second expression.

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 30 x^{2} (2 x) - 30 x^{2} \cdot 1 - 20 x (2 x) - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.7

Simplify each term.

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Step 1.14.2.1.7.1

Rewrite using the commutative property of multiplication.

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 30 \cdot 2 x^{2} x - 30 x^{2} \cdot 1 - 20 x (2 x) - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.7.2

Multiply $x^{2}$ by $x$ by adding the exponents.

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Step 1.14.2.1.7.2.1

Move $x$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 30 \cdot 2 (x \cdot x^{2}) - 30 x^{2} \cdot 1 - 20 x (2 x) - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.7.2.2

Multiply $x$ by $x^{2}$ .

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Step 1.14.2.1.7.2.2.1

Raise $x$ to the power of $1$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 30 \cdot 2 (x^{1} x^{2}) - 30 x^{2} \cdot 1 - 20 x (2 x) - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.7.2.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 30 \cdot 2 x^{1 + 2} - 30 x^{2} \cdot 1 - 20 x (2 x) - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.7.2.3

Add $1$ and $2$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 30 \cdot 2 x^{3} - 30 x^{2} \cdot 1 - 20 x (2 x) - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.7.3

Multiply $- 30$ by $2$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 60 x^{3} - 30 x^{2} \cdot 1 - 20 x (2 x) - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.7.4

Multiply $- 30$ by $1$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 60 x^{3} - 30 x^{2} - 20 x (2 x) - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.7.5

Rewrite using the commutative property of multiplication.

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 60 x^{3} - 30 x^{2} - 20 \cdot 2 x \cdot x - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.7.6

Multiply $x$ by $x$ by adding the exponents.

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Step 1.14.2.1.7.6.1

Move $x$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 60 x^{3} - 30 x^{2} - 20 \cdot 2 (x \cdot x) - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.7.6.2

Multiply $x$ by $x$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 60 x^{3} - 30 x^{2} - 20 \cdot 2 x^{2} - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.7.7

Multiply $- 20$ by $2$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 60 x^{3} - 30 x^{2} - 40 x^{2} - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.7.8

Multiply $- 20$ by $1$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 60 x^{3} - 30 x^{2} - 40 x^{2} - 20 x + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.7.9

Multiply $2$ by $80$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 60 x^{3} - 30 x^{2} - 40 x^{2} - 20 x + 160 x + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.7.10

Multiply $80$ by $1$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 60 x^{3} - 30 x^{2} - 40 x^{2} - 20 x + 160 x + 80}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.8

Subtract $40 x^{2}$ from $- 30 x^{2}$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 60 x^{3} - 70 x^{2} - 20 x + 160 x + 80}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.1.9

Add $- 20 x$ and $160 x$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 60 x^{3} - 70 x^{2} + 140 x + 80}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.2

Subtract $60 x^{3}$ from $30 x^{3}$ .

$- \frac{- 30 x^{3} + 40 x^{2} + 100 x + 30 - 70 x^{2} + 140 x + 80}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.3

Subtract $70 x^{2}$ from $40 x^{2}$ .

$- \frac{- 30 x^{3} - 30 x^{2} + 100 x + 30 + 140 x + 80}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.4

Add $100 x$ and $140 x$ .

$- \frac{- 30 x^{3} - 30 x^{2} + 240 x + 30 + 80}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.2.5

Add $30$ and $80$ .

$- \frac{- 30 x^{3} - 30 x^{2} + 240 x + 110}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.3

Factor $10$ out of $- 30 x^{3} - 30 x^{2} + 240 x + 110$ .

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Step 1.14.3.1

Factor $10$ out of $- 30 x^{3}$ .

$- \frac{10 (- 3 x^{3}) - 30 x^{2} + 240 x + 110}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.3.2

Factor $10$ out of $- 30 x^{2}$ .

$- \frac{10 (- 3 x^{3}) + 10 (- 3 x^{2}) + 240 x + 110}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.3.3

Factor $10$ out of $240 x$ .

$- \frac{10 (- 3 x^{3}) + 10 (- 3 x^{2}) + 10 (24 x) + 110}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.3.4

Factor $10$ out of $110$ .

$- \frac{10 (- 3 x^{3}) + 10 (- 3 x^{2}) + 10 (24 x) + 10 (11)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.3.5

Factor $10$ out of $10 (- 3 x^{3}) + 10 (- 3 x^{2})$ .

$- \frac{10 (- 3 x^{3} - 3 x^{2}) + 10 (24 x) + 10 (11)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.3.6

Factor $10$ out of $10 (- 3 x^{3} - 3 x^{2}) + 10 (24 x)$ .

$- \frac{10 (- 3 x^{3} - 3 x^{2} + 24 x) + 10 (11)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.3.7

Factor $10$ out of $10 (- 3 x^{3} - 3 x^{2} + 24 x) + 10 (11)$ .

$- \frac{10 (- 3 x^{3} - 3 x^{2} + 24 x + 11)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.4

Factor $- 1$ out of $- 3 x^{3}$ .

$- \frac{10 (- (3 x^{3}) - 3 x^{2} + 24 x + 11)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.5

Factor $- 1$ out of $- 3 x^{2}$ .

$- \frac{10 (- (3 x^{3}) - (3 x^{2}) + 24 x + 11)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.6

Factor $- 1$ out of $- (3 x^{3}) - (3 x^{2})$ .

$- \frac{10 (- (3 x^{3} + 3 x^{2}) + 24 x + 11)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.7

Factor $- 1$ out of $24 x$ .

$- \frac{10 (- (3 x^{3} + 3 x^{2}) - (- 24 x) + 11)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.8

Factor $- 1$ out of $- (3 x^{3} + 3 x^{2}) - (- 24 x)$ .

$- \frac{10 (- (3 x^{3} + 3 x^{2} - 24 x) + 11)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.9

Rewrite $11$ as $- 1 (- 11)$ .

$- \frac{10 (- (3 x^{3} + 3 x^{2} - 24 x) - 1 (- 11))}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.10

Factor $- 1$ out of $- (3 x^{3} + 3 x^{2} - 24 x) - 1 (- 11)$ .

$- \frac{10 (- (3 x^{3} + 3 x^{2} - 24 x - 11))}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.11

Rewrite $- (3 x^{3} + 3 x^{2} - 24 x - 11)$ as $- 1 (3 x^{3} + 3 x^{2} - 24 x - 11)$ .

$- \frac{10 (- 1 (3 x^{3} + 3 x^{2} - 24 x - 11))}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.12

Move the negative in front of the fraction.

$- - \frac{10 (3 x^{3} + 3 x^{2} - 24 x - 11)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.13

Multiply $- 1$ by $- 1$ .

$1 \frac{10 (3 x^{3} + 3 x^{2} - 24 x - 11)}{{(x^{2} + x + 3)}^{3}}$

Step 1.14.14

Multiply $\frac{10 (3 x^{3} + 3 x^{2} - 24 x - 11)}{{(x^{2} + x + 3)}^{3}}$ by $1$ .

$\frac{10 (3 x^{3} + 3 x^{2} - 24 x - 11)}{{(x^{2} + x + 3)}^{3}}$

Step 2

Find the second derivative of the function.

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Step 2.1

Since $10$ is constant with respect to $x$ , the derivative of $\frac{10 (3 x^{3} + 3 x^{2} - 24 x - 11)}{{(x^{2} + x + 3)}^{3}}$ with respect to $x$ is $10 \frac{d}{d x} [\frac{3 x^{3} + 3 x^{2} - 24 x - 11}{{(x^{2} + x + 3)}^{3}}]$ .

$f'' (x) = 10 \frac{d}{d x} (\frac{3 x^{3} + 3 x^{2} - 24 x - 11}{{(x^{2} + x + 3)}^{3}})$

Step 2.2

Differentiate using the Quotient Rule which states that $\frac{d}{d x} [\frac{f (x)}{g (x)}]$ is $\frac{g (x) \frac{d}{d x} [f (x)] - f (x) \frac{d}{d x} [g (x)]}{{g (x)}^{2}}$ where $f (x) = 3 x^{3} + 3 x^{2} - 24 x - 11$ and $g (x) = {(x^{2} + x + 3)}^{3}$ .

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{3} \frac{d}{d x} (3 x^{3} + 3 x^{2} - 24 x - 11) - (3 x^{3} + 3 x^{2} - 24 x - 11) \frac{d}{d x} {(x^{2} + x + 3)}^{3}}{{({(x^{2} + x + 3)}^{3})}^{2}})$

Step 2.3

Differentiate.

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Step 2.3.1

Multiply the exponents in ${({(x^{2} + x + 3)}^{3})}^{2}$ .

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Step 2.3.1.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{3} \frac{d}{d x} (3 x^{3} + 3 x^{2} - 24 x - 11) - (3 x^{3} + 3 x^{2} - 24 x - 11) \frac{d}{d x} {(x^{2} + x + 3)}^{3}}{{(x^{2} + x + 3)}^{3 \cdot 2}})$

Step 2.3.1.2

Multiply $3$ by $2$ .

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{3} \frac{d}{d x} (3 x^{3} + 3 x^{2} - 24 x - 11) - (3 x^{3} + 3 x^{2} - 24 x - 11) \frac{d}{d x} {(x^{2} + x + 3)}^{3}}{{(x^{2} + x + 3)}^{6}})$

Step 2.3.2

By the Sum Rule, the derivative of $3 x^{3} + 3 x^{2} - 24 x - 11$ with respect to $x$ is $\frac{d}{d x} [3 x^{3}] + \frac{d}{d x} [3 x^{2}] + \frac{d}{d x} [- 24 x] + \frac{d}{d x} [- 11]$ .

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{3} (\frac{d}{d x} (3 x^{3}) + \frac{d}{d x} (3 x^{2}) + \frac{d}{d x} (- 24 x) + \frac{d}{d x} (- 11)) - (3 x^{3} + 3 x^{2} - 24 x - 11) \frac{d}{d x} {(x^{2} + x + 3)}^{3}}{{(x^{2} + x + 3)}^{6}})$

Step 2.3.3

Since $3$ is constant with respect to $x$ , the derivative of $3 x^{3}$ with respect to $x$ is $3 \frac{d}{d x} [x^{3}]$ .

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{3} (3 \frac{d}{d x} (x^{3}) + \frac{d}{d x} (3 x^{2}) + \frac{d}{d x} (- 24 x) + \frac{d}{d x} (- 11)) - (3 x^{3} + 3 x^{2} - 24 x - 11) \frac{d}{d x} {(x^{2} + x + 3)}^{3}}{{(x^{2} + x + 3)}^{6}})$

Step 2.3.4

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 3$ .

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{3} (3 (3 x^{2}) + \frac{d}{d x} (3 x^{2}) + \frac{d}{d x} (- 24 x) + \frac{d}{d x} (- 11)) - (3 x^{3} + 3 x^{2} - 24 x - 11) \frac{d}{d x} {(x^{2} + x + 3)}^{3}}{{(x^{2} + x + 3)}^{6}})$

Step 2.3.5

Multiply $3$ by $3$ .

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{3} (9 x^{2} + \frac{d}{d x} (3 x^{2}) + \frac{d}{d x} (- 24 x) + \frac{d}{d x} (- 11)) - (3 x^{3} + 3 x^{2} - 24 x - 11) \frac{d}{d x} {(x^{2} + x + 3)}^{3}}{{(x^{2} + x + 3)}^{6}})$

Step 2.3.6

Since $3$ is constant with respect to $x$ , the derivative of $3 x^{2}$ with respect to $x$ is $3 \frac{d}{d x} [x^{2}]$ .

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{3} (9 x^{2} + 3 \frac{d}{d x} (x^{2}) + \frac{d}{d x} (- 24 x) + \frac{d}{d x} (- 11)) - (3 x^{3} + 3 x^{2} - 24 x - 11) \frac{d}{d x} {(x^{2} + x + 3)}^{3}}{{(x^{2} + x + 3)}^{6}})$

Step 2.3.7

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 2$ .

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{3} (9 x^{2} + 3 (2 x) + \frac{d}{d x} (- 24 x) + \frac{d}{d x} (- 11)) - (3 x^{3} + 3 x^{2} - 24 x - 11) \frac{d}{d x} {(x^{2} + x + 3)}^{3}}{{(x^{2} + x + 3)}^{6}})$

Step 2.3.8

Multiply $2$ by $3$ .

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{3} (9 x^{2} + 6 x + \frac{d}{d x} (- 24 x) + \frac{d}{d x} (- 11)) - (3 x^{3} + 3 x^{2} - 24 x - 11) \frac{d}{d x} {(x^{2} + x + 3)}^{3}}{{(x^{2} + x + 3)}^{6}})$

Step 2.3.9

Since $- 24$ is constant with respect to $x$ , the derivative of $- 24 x$ with respect to $x$ is $- 24 \frac{d}{d x} [x]$ .

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{3} (9 x^{2} + 6 x - 24 \frac{d}{d x} x + \frac{d}{d x} (- 11)) - (3 x^{3} + 3 x^{2} - 24 x - 11) \frac{d}{d x} {(x^{2} + x + 3)}^{3}}{{(x^{2} + x + 3)}^{6}})$

Step 2.3.10

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 1$ .

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{3} (9 x^{2} + 6 x - 24 \cdot 1 + \frac{d}{d x} (- 11)) - (3 x^{3} + 3 x^{2} - 24 x - 11) \frac{d}{d x} {(x^{2} + x + 3)}^{3}}{{(x^{2} + x + 3)}^{6}})$

Step 2.3.11

Multiply $- 24$ by $1$ .

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{3} (9 x^{2} + 6 x - 24 + \frac{d}{d x} (- 11)) - (3 x^{3} + 3 x^{2} - 24 x - 11) \frac{d}{d x} {(x^{2} + x + 3)}^{3}}{{(x^{2} + x + 3)}^{6}})$

Step 2.3.12

Since $- 11$ is constant with respect to $x$ , the derivative of $- 11$ with respect to $x$ is $0$ .

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{3} (9 x^{2} + 6 x - 24 + 0) - (3 x^{3} + 3 x^{2} - 24 x - 11) \frac{d}{d x} {(x^{2} + x + 3)}^{3}}{{(x^{2} + x + 3)}^{6}})$

Step 2.3.13

Add $9 x^{2} + 6 x - 24$ and $0$ .

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{3} (9 x^{2} + 6 x - 24) - (3 x^{3} + 3 x^{2} - 24 x - 11) \frac{d}{d x} {(x^{2} + x + 3)}^{3}}{{(x^{2} + x + 3)}^{6}})$

Step 2.4

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = x^{3}$ and $g (x) = x^{2} + x + 3$ .

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Step 2.4.1

To apply the Chain Rule, set $u$ as $x^{2} + x + 3$ .

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{3} (9 x^{2} + 6 x - 24) - (3 x^{3} + 3 x^{2} - 24 x - 11) (\frac{d}{d u} (u^{3}) \frac{d}{d x} (x^{2} + x + 3))}{{(x^{2} + x + 3)}^{6}})$

Step 2.4.2

Differentiate using the Power Rule which states that $\frac{d}{d u} [u^{n}]$ is $n u^{n - 1}$ where $n = 3$ .

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{3} (9 x^{2} + 6 x - 24) - (3 x^{3} + 3 x^{2} - 24 x - 11) (3 u^{2} \frac{d}{d x} (x^{2} + x + 3))}{{(x^{2} + x + 3)}^{6}})$

Step 2.4.3

Replace all occurrences of $u$ with $x^{2} + x + 3$ .

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{3} (9 x^{2} + 6 x - 24) - (3 x^{3} + 3 x^{2} - 24 x - 11) (3 {(x^{2} + x + 3)}^{2} \frac{d}{d x} (x^{2} + x + 3))}{{(x^{2} + x + 3)}^{6}})$

Step 2.5

Simplify with factoring out.

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Step 2.5.1

Multiply $3$ by $- 1$ .

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{3} (9 x^{2} + 6 x - 24) - 3 (3 x^{3} + 3 x^{2} - 24 x - 11) ({(x^{2} + x + 3)}^{2} \frac{d}{d x} (x^{2} + x + 3))}{{(x^{2} + x + 3)}^{6}})$

Step 2.5.2

Factor ${(x^{2} + x + 3)}^{2}$ out of ${(x^{2} + x + 3)}^{3} (9 x^{2} + 6 x - 24) - 3 (3 x^{3} + 3 x^{2} - 24 x - 11) ({(x^{2} + x + 3)}^{2} \frac{d}{d x} [x^{2} + x + 3])$ .

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Step 2.5.2.1

Factor ${(x^{2} + x + 3)}^{2}$ out of ${(x^{2} + x + 3)}^{3} (9 x^{2} + 6 x - 24)$ .

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{2} ((x^{2} + x + 3) (9 x^{2} + 6 x - 24)) - 3 (3 x^{3} + 3 x^{2} - 24 x - 11) ({(x^{2} + x + 3)}^{2} \frac{d}{d x} (x^{2} + x + 3))}{{(x^{2} + x + 3)}^{6}})$

Step 2.5.2.2

Factor ${(x^{2} + x + 3)}^{2}$ out of $- 3 (3 x^{3} + 3 x^{2} - 24 x - 11) ({(x^{2} + x + 3)}^{2} \frac{d}{d x} [x^{2} + x + 3])$ .

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{2} ((x^{2} + x + 3) (9 x^{2} + 6 x - 24)) + {(x^{2} + x + 3)}^{2} (- 3 (3 x^{3} + 3 x^{2} - 24 x - 11) (\frac{d}{d x} (x^{2} + x + 3)))}{{(x^{2} + x + 3)}^{6}})$

Step 2.5.2.3

Factor ${(x^{2} + x + 3)}^{2}$ out of ${(x^{2} + x + 3)}^{2} ((x^{2} + x + 3) (9 x^{2} + 6 x - 24)) + {(x^{2} + x + 3)}^{2} (- 3 (3 x^{3} + 3 x^{2} - 24 x - 11) (\frac{d}{d x} [x^{2} + x + 3]))$ .

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{2} ((x^{2} + x + 3) (9 x^{2} + 6 x - 24) - 3 (3 x^{3} + 3 x^{2} - 24 x - 11) (\frac{d}{d x} (x^{2} + x + 3)))}{{(x^{2} + x + 3)}^{6}})$

Step 2.6

Cancel the common factors.

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Step 2.6.1

Factor ${(x^{2} + x + 3)}^{2}$ out of ${(x^{2} + x + 3)}^{6}$ .

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{2} ((x^{2} + x + 3) (9 x^{2} + 6 x - 24) - 3 (3 x^{3} + 3 x^{2} - 24 x - 11) (\frac{d}{d x} (x^{2} + x + 3)))}{{(x^{2} + x + 3)}^{2} {(x^{2} + x + 3)}^{4}})$

Step 2.6.2

Cancel the common factor.

$f'' (x) = 10 (\frac{{(x^{2} + x + 3)}^{2} ((x^{2} + x + 3) (9 x^{2} + 6 x - 24) - 3 (3 x^{3} + 3 x^{2} - 24 x - 11) (\frac{d}{d x} (x^{2} + x + 3)))}{{(x^{2} + x + 3)}^{2} {(x^{2} + x + 3)}^{4}})$

Step 2.6.3

Rewrite the expression.

$f'' (x) = 10 (\frac{(x^{2} + x + 3) (9 x^{2} + 6 x - 24) - 3 (3 x^{3} + 3 x^{2} - 24 x - 11) (\frac{d}{d x} (x^{2} + x + 3))}{{(x^{2} + x + 3)}^{4}})$

Step 2.7

By the Sum Rule, the derivative of $x^{2} + x + 3$ with respect to $x$ is $\frac{d}{d x} [x^{2}] + \frac{d}{d x} [x] + \frac{d}{d x} [3]$ .

$f'' (x) = 10 (\frac{(x^{2} + x + 3) (9 x^{2} + 6 x - 24) - 3 (3 x^{3} + 3 x^{2} - 24 x - 11) (\frac{d}{d x} (x^{2}) + \frac{d}{d x} (x) + \frac{d}{d x} (3))}{{(x^{2} + x + 3)}^{4}})$

Step 2.8

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 2$ .

$f'' (x) = 10 (\frac{(x^{2} + x + 3) (9 x^{2} + 6 x - 24) - 3 (3 x^{3} + 3 x^{2} - 24 x - 11) (2 x + \frac{d}{d x} (x) + \frac{d}{d x} (3))}{{(x^{2} + x + 3)}^{4}})$

Step 2.9

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 1$ .

$f'' (x) = 10 (\frac{(x^{2} + x + 3) (9 x^{2} + 6 x - 24) - 3 (3 x^{3} + 3 x^{2} - 24 x - 11) (2 x + 1 + \frac{d}{d x} (3))}{{(x^{2} + x + 3)}^{4}})$

Step 2.10

Since $3$ is constant with respect to $x$ , the derivative of $3$ with respect to $x$ is $0$ .

$f'' (x) = 10 (\frac{(x^{2} + x + 3) (9 x^{2} + 6 x - 24) - 3 (3 x^{3} + 3 x^{2} - 24 x - 11) (2 x + 1 + 0)}{{(x^{2} + x + 3)}^{4}})$

Step 2.11

Combine fractions.

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Step 2.11.1

Add $2 x + 1$ and $0$ .

$f'' (x) = 10 (\frac{(x^{2} + x + 3) (9 x^{2} + 6 x - 24) - 3 (3 x^{3} + 3 x^{2} - 24 x - 11) (2 x + 1)}{{(x^{2} + x + 3)}^{4}})$

Step 2.11.2

Combine $10$ and $\frac{(x^{2} + x + 3) (9 x^{2} + 6 x - 24) - 3 (3 x^{3} + 3 x^{2} - 24 x - 11) (2 x + 1)}{{(x^{2} + x + 3)}^{4}}$ .

$f'' (x) = \frac{10 ((x^{2} + x + 3) (9 x^{2} + 6 x - 24) - 3 (3 x^{3} + 3 x^{2} - 24 x - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12

Simplify.

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Step 2.12.1

Apply the distributive property.

$f'' (x) = \frac{10 ((x^{2} + x + 3) (9 x^{2} + 6 x - 24) + (- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.2

Apply the distributive property.

$f'' (x) = \frac{10 ((x^{2} + x + 3) (9 x^{2} + 6 x - 24)) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3

Simplify the numerator.

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Step 2.12.3.1

Simplify each term.

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Step 2.12.3.1.1

Expand $(x^{2} + x + 3) (9 x^{2} + 6 x - 24)$ by multiplying each term in the first expression by each term in the second expression.

$f'' (x) = \frac{10 (x^{2} (9 x^{2}) + x^{2} (6 x) + x^{2} \cdot - 24 + x (9 x^{2}) + x (6 x) + x \cdot - 24 + 3 (9 x^{2}) + 3 (6 x) + 3 \cdot - 24) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.2

Simplify each term.

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Step 2.12.3.1.2.1

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{10 (9 x^{2} x^{2} + x^{2} (6 x) + x^{2} \cdot - 24 + x (9 x^{2}) + x (6 x) + x \cdot - 24 + 3 (9 x^{2}) + 3 (6 x) + 3 \cdot - 24) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.2.2

Multiply $x^{2}$ by $x^{2}$ by adding the exponents.

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Step 2.12.3.1.2.2.1

Move $x^{2}$ .

$f'' (x) = \frac{10 (9 (x^{2} x^{2}) + x^{2} (6 x) + x^{2} \cdot - 24 + x (9 x^{2}) + x (6 x) + x \cdot - 24 + 3 (9 x^{2}) + 3 (6 x) + 3 \cdot - 24) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.2.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{10 (9 x^{2 + 2} + x^{2} (6 x) + x^{2} \cdot - 24 + x (9 x^{2}) + x (6 x) + x \cdot - 24 + 3 (9 x^{2}) + 3 (6 x) + 3 \cdot - 24) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.2.2.3

Add $2$ and $2$ .

$f'' (x) = \frac{10 (9 x^{4} + x^{2} (6 x) + x^{2} \cdot - 24 + x (9 x^{2}) + x (6 x) + x \cdot - 24 + 3 (9 x^{2}) + 3 (6 x) + 3 \cdot - 24) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.2.3

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{10 (9 x^{4} + 6 x^{2} x + x^{2} \cdot - 24 + x (9 x^{2}) + x (6 x) + x \cdot - 24 + 3 (9 x^{2}) + 3 (6 x) + 3 \cdot - 24) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.2.4

Multiply $x^{2}$ by $x$ by adding the exponents.

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Step 2.12.3.1.2.4.1

Move $x$ .

$f'' (x) = \frac{10 (9 x^{4} + 6 (x \cdot x^{2}) + x^{2} \cdot - 24 + x (9 x^{2}) + x (6 x) + x \cdot - 24 + 3 (9 x^{2}) + 3 (6 x) + 3 \cdot - 24) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.2.4.2

Multiply $x$ by $x^{2}$ .

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Step 2.12.3.1.2.4.2.1

Raise $x$ to the power of $1$ .

Step 2.12.3.1.2.4.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{10 (9 x^{4} + 6 x^{1 + 2} + x^{2} \cdot - 24 + x (9 x^{2}) + x (6 x) + x \cdot - 24 + 3 (9 x^{2}) + 3 (6 x) + 3 \cdot - 24) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.2.4.3

Add $1$ and $2$ .

$f'' (x) = \frac{10 (9 x^{4} + 6 x^{3} + x^{2} \cdot - 24 + x (9 x^{2}) + x (6 x) + x \cdot - 24 + 3 (9 x^{2}) + 3 (6 x) + 3 \cdot - 24) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.2.5

Move $- 24$ to the left of $x^{2}$ .

$f'' (x) = \frac{10 (9 x^{4} + 6 x^{3} - 24 \cdot x^{2} + x (9 x^{2}) + x (6 x) + x \cdot - 24 + 3 (9 x^{2}) + 3 (6 x) + 3 \cdot - 24) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.2.6

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{10 (9 x^{4} + 6 x^{3} - 24 x^{2} + 9 x \cdot x^{2} + x (6 x) + x \cdot - 24 + 3 (9 x^{2}) + 3 (6 x) + 3 \cdot - 24) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.2.7

Multiply $x$ by $x^{2}$ by adding the exponents.

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Step 2.12.3.1.2.7.1

Move $x^{2}$ .

$f'' (x) = \frac{10 (9 x^{4} + 6 x^{3} - 24 x^{2} + 9 (x^{2} x) + x (6 x) + x \cdot - 24 + 3 (9 x^{2}) + 3 (6 x) + 3 \cdot - 24) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.2.7.2

Multiply $x^{2}$ by $x$ .

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Step 2.12.3.1.2.7.2.1

Raise $x$ to the power of $1$ .

Step 2.12.3.1.2.7.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{10 (9 x^{4} + 6 x^{3} - 24 x^{2} + 9 x^{2 + 1} + x (6 x) + x \cdot - 24 + 3 (9 x^{2}) + 3 (6 x) + 3 \cdot - 24) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.2.7.3

Add $2$ and $1$ .

$f'' (x) = \frac{10 (9 x^{4} + 6 x^{3} - 24 x^{2} + 9 x^{3} + x (6 x) + x \cdot - 24 + 3 (9 x^{2}) + 3 (6 x) + 3 \cdot - 24) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.2.8

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{10 (9 x^{4} + 6 x^{3} - 24 x^{2} + 9 x^{3} + 6 x \cdot x + x \cdot - 24 + 3 (9 x^{2}) + 3 (6 x) + 3 \cdot - 24) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.2.9

Multiply $x$ by $x$ by adding the exponents.

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Step 2.12.3.1.2.9.1

Move $x$ .

$f'' (x) = \frac{10 (9 x^{4} + 6 x^{3} - 24 x^{2} + 9 x^{3} + 6 (x \cdot x) + x \cdot - 24 + 3 (9 x^{2}) + 3 (6 x) + 3 \cdot - 24) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.2.9.2

Multiply $x$ by $x$ .

$f'' (x) = \frac{10 (9 x^{4} + 6 x^{3} - 24 x^{2} + 9 x^{3} + 6 x^{2} + x \cdot - 24 + 3 (9 x^{2}) + 3 (6 x) + 3 \cdot - 24) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.2.10

Move $- 24$ to the left of $x$ .

$f'' (x) = \frac{10 (9 x^{4} + 6 x^{3} - 24 x^{2} + 9 x^{3} + 6 x^{2} - 24 \cdot x + 3 (9 x^{2}) + 3 (6 x) + 3 \cdot - 24) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.2.11

Multiply $9$ by $3$ .

$f'' (x) = \frac{10 (9 x^{4} + 6 x^{3} - 24 x^{2} + 9 x^{3} + 6 x^{2} - 24 x + 27 x^{2} + 3 (6 x) + 3 \cdot - 24) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.2.12

Multiply $6$ by $3$ .

$f'' (x) = \frac{10 (9 x^{4} + 6 x^{3} - 24 x^{2} + 9 x^{3} + 6 x^{2} - 24 x + 27 x^{2} + 18 x + 3 \cdot - 24) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.2.13

Multiply $3$ by $- 24$ .

$f'' (x) = \frac{10 (9 x^{4} + 6 x^{3} - 24 x^{2} + 9 x^{3} + 6 x^{2} - 24 x + 27 x^{2} + 18 x - 72) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.3

Add $6 x^{3}$ and $9 x^{3}$ .

$f'' (x) = \frac{10 (9 x^{4} + 15 x^{3} - 24 x^{2} + 6 x^{2} - 24 x + 27 x^{2} + 18 x - 72) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.4

Add $- 24 x^{2}$ and $6 x^{2}$ .

$f'' (x) = \frac{10 (9 x^{4} + 15 x^{3} - 18 x^{2} - 24 x + 27 x^{2} + 18 x - 72) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.5

Add $- 18 x^{2}$ and $27 x^{2}$ .

$f'' (x) = \frac{10 (9 x^{4} + 15 x^{3} + 9 x^{2} - 24 x + 18 x - 72) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.6

Add $- 24 x$ and $18 x$ .

$f'' (x) = \frac{10 (9 x^{4} + 15 x^{3} + 9 x^{2} - 6 x - 72) + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.7

Apply the distributive property.

$f'' (x) = \frac{10 (9 x^{4}) + 10 (15 x^{3}) + 10 (9 x^{2}) + 10 (- 6 x) + 10 \cdot - 72 + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.8

Simplify.

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Step 2.12.3.1.8.1

Multiply $9$ by $10$ .

$f'' (x) = \frac{90 x^{4} + 10 (15 x^{3}) + 10 (9 x^{2}) + 10 (- 6 x) + 10 \cdot - 72 + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.8.2

Multiply $15$ by $10$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 10 (9 x^{2}) + 10 (- 6 x) + 10 \cdot - 72 + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.8.3

Multiply $9$ by $10$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} + 10 (- 6 x) + 10 \cdot - 72 + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.8.4

Multiply $- 6$ by $10$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x + 10 \cdot - 72 + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.8.5

Multiply $10$ by $- 72$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 ((- 3 (3 x^{3}) - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.9

Simplify each term.

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Step 2.12.3.1.9.1

Multiply $3$ by $- 3$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 ((- 9 x^{3} - 3 (3 x^{2}) - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.9.2

Multiply $3$ by $- 3$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 ((- 9 x^{3} - 9 x^{2} - 3 (- 24 x) - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.9.3

Multiply $- 24$ by $- 3$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 ((- 9 x^{3} - 9 x^{2} + 72 x - 3 \cdot - 11) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.9.4

Multiply $- 3$ by $- 11$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 ((- 9 x^{3} - 9 x^{2} + 72 x + 33) (2 x + 1))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.10

Expand $(- 9 x^{3} - 9 x^{2} + 72 x + 33) (2 x + 1)$ by multiplying each term in the first expression by each term in the second expression.

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 9 x^{3} (2 x) - 9 x^{3} \cdot 1 - 9 x^{2} (2 x) - 9 x^{2} \cdot 1 + 72 x (2 x) + 72 x \cdot 1 + 33 (2 x) + 33 \cdot 1)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.11

Simplify each term.

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Step 2.12.3.1.11.1

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 9 \cdot (2 x^{3} x) - 9 x^{3} \cdot 1 - 9 x^{2} (2 x) - 9 x^{2} \cdot 1 + 72 x (2 x) + 72 x \cdot 1 + 33 (2 x) + 33 \cdot 1)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.11.2

Multiply $x^{3}$ by $x$ by adding the exponents.

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Step 2.12.3.1.11.2.1

Move $x$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 9 \cdot (2 (x \cdot x^{3})) - 9 x^{3} \cdot 1 - 9 x^{2} (2 x) - 9 x^{2} \cdot 1 + 72 x (2 x) + 72 x \cdot 1 + 33 (2 x) + 33 \cdot 1)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.11.2.2

Multiply $x$ by $x^{3}$ .

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Step 2.12.3.1.11.2.2.1

Raise $x$ to the power of $1$ .

Step 2.12.3.1.11.2.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 9 \cdot (2 x^{1 + 3}) - 9 x^{3} \cdot 1 - 9 x^{2} (2 x) - 9 x^{2} \cdot 1 + 72 x (2 x) + 72 x \cdot 1 + 33 (2 x) + 33 \cdot 1)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.11.2.3

Add $1$ and $3$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 9 \cdot (2 x^{4}) - 9 x^{3} \cdot 1 - 9 x^{2} (2 x) - 9 x^{2} \cdot 1 + 72 x (2 x) + 72 x \cdot 1 + 33 (2 x) + 33 \cdot 1)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.11.3

Multiply $- 9$ by $2$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 18 x^{4} - 9 x^{3} \cdot 1 - 9 x^{2} (2 x) - 9 x^{2} \cdot 1 + 72 x (2 x) + 72 x \cdot 1 + 33 (2 x) + 33 \cdot 1)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.11.4

Multiply $- 9$ by $1$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 18 x^{4} - 9 x^{3} - 9 x^{2} (2 x) - 9 x^{2} \cdot 1 + 72 x (2 x) + 72 x \cdot 1 + 33 (2 x) + 33 \cdot 1)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.11.5

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 18 x^{4} - 9 x^{3} - 9 \cdot (2 x^{2} x) - 9 x^{2} \cdot 1 + 72 x (2 x) + 72 x \cdot 1 + 33 (2 x) + 33 \cdot 1)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.11.6

Multiply $x^{2}$ by $x$ by adding the exponents.

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Step 2.12.3.1.11.6.1

Move $x$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 18 x^{4} - 9 x^{3} - 9 \cdot (2 (x \cdot x^{2})) - 9 x^{2} \cdot 1 + 72 x (2 x) + 72 x \cdot 1 + 33 (2 x) + 33 \cdot 1)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.11.6.2

Multiply $x$ by $x^{2}$ .

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Step 2.12.3.1.11.6.2.1

Raise $x$ to the power of $1$ .

Step 2.12.3.1.11.6.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 18 x^{4} - 9 x^{3} - 9 \cdot (2 x^{1 + 2}) - 9 x^{2} \cdot 1 + 72 x (2 x) + 72 x \cdot 1 + 33 (2 x) + 33 \cdot 1)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.11.6.3

Add $1$ and $2$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 18 x^{4} - 9 x^{3} - 9 \cdot (2 x^{3}) - 9 x^{2} \cdot 1 + 72 x (2 x) + 72 x \cdot 1 + 33 (2 x) + 33 \cdot 1)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.11.7

Multiply $- 9$ by $2$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 18 x^{4} - 9 x^{3} - 18 x^{3} - 9 x^{2} \cdot 1 + 72 x (2 x) + 72 x \cdot 1 + 33 (2 x) + 33 \cdot 1)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.11.8

Multiply $- 9$ by $1$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 18 x^{4} - 9 x^{3} - 18 x^{3} - 9 x^{2} + 72 x (2 x) + 72 x \cdot 1 + 33 (2 x) + 33 \cdot 1)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.11.9

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 18 x^{4} - 9 x^{3} - 18 x^{3} - 9 x^{2} + 72 \cdot (2 x \cdot x) + 72 x \cdot 1 + 33 (2 x) + 33 \cdot 1)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.11.10

Multiply $x$ by $x$ by adding the exponents.

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Step 2.12.3.1.11.10.1

Move $x$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 18 x^{4} - 9 x^{3} - 18 x^{3} - 9 x^{2} + 72 \cdot (2 (x \cdot x)) + 72 x \cdot 1 + 33 (2 x) + 33 \cdot 1)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.11.10.2

Multiply $x$ by $x$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 18 x^{4} - 9 x^{3} - 18 x^{3} - 9 x^{2} + 72 \cdot (2 x^{2}) + 72 x \cdot 1 + 33 (2 x) + 33 \cdot 1)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.11.11

Multiply $72$ by $2$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 18 x^{4} - 9 x^{3} - 18 x^{3} - 9 x^{2} + 144 x^{2} + 72 x \cdot 1 + 33 (2 x) + 33 \cdot 1)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.11.12

Multiply $72$ by $1$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 18 x^{4} - 9 x^{3} - 18 x^{3} - 9 x^{2} + 144 x^{2} + 72 x + 33 (2 x) + 33 \cdot 1)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.11.13

Multiply $2$ by $33$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 18 x^{4} - 9 x^{3} - 18 x^{3} - 9 x^{2} + 144 x^{2} + 72 x + 66 x + 33 \cdot 1)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.11.14

Multiply $33$ by $1$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 18 x^{4} - 9 x^{3} - 18 x^{3} - 9 x^{2} + 144 x^{2} + 72 x + 66 x + 33)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.12

Subtract $18 x^{3}$ from $- 9 x^{3}$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 18 x^{4} - 27 x^{3} - 9 x^{2} + 144 x^{2} + 72 x + 66 x + 33)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.13

Add $- 9 x^{2}$ and $144 x^{2}$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 18 x^{4} - 27 x^{3} + 135 x^{2} + 72 x + 66 x + 33)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.14

Add $72 x$ and $66 x$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 18 x^{4} - 27 x^{3} + 135 x^{2} + 138 x + 33)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.15

Apply the distributive property.

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 + 10 (- 18 x^{4}) + 10 (- 27 x^{3}) + 10 (135 x^{2}) + 10 (138 x) + 10 \cdot 33}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.16

Simplify.

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Step 2.12.3.1.16.1

Multiply $- 18$ by $10$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 - 180 x^{4} + 10 (- 27 x^{3}) + 10 (135 x^{2}) + 10 (138 x) + 10 \cdot 33}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.16.2

Multiply $- 27$ by $10$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 - 180 x^{4} - 270 x^{3} + 10 (135 x^{2}) + 10 (138 x) + 10 \cdot 33}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.16.3

Multiply $135$ by $10$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 - 180 x^{4} - 270 x^{3} + 1350 x^{2} + 10 (138 x) + 10 \cdot 33}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.16.4

Multiply $138$ by $10$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 - 180 x^{4} - 270 x^{3} + 1350 x^{2} + 1380 x + 10 \cdot 33}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.1.16.5

Multiply $10$ by $33$ .

$f'' (x) = \frac{90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 - 180 x^{4} - 270 x^{3} + 1350 x^{2} + 1380 x + 330}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.2

Subtract $180 x^{4}$ from $90 x^{4}$ .

$f'' (x) = \frac{- 90 x^{4} + 150 x^{3} + 90 x^{2} - 60 x - 720 - 270 x^{3} + 1350 x^{2} + 1380 x + 330}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.3

Subtract $270 x^{3}$ from $150 x^{3}$ .

$f'' (x) = \frac{- 90 x^{4} - 120 x^{3} + 90 x^{2} - 60 x - 720 + 1350 x^{2} + 1380 x + 330}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.4

Add $90 x^{2}$ and $1350 x^{2}$ .

$f'' (x) = \frac{- 90 x^{4} - 120 x^{3} + 1440 x^{2} - 60 x - 720 + 1380 x + 330}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.5

Add $- 60 x$ and $1380 x$ .

$f'' (x) = \frac{- 90 x^{4} - 120 x^{3} + 1440 x^{2} + 1320 x - 720 + 330}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.3.6

Add $- 720$ and $330$ .

$f'' (x) = \frac{- 90 x^{4} - 120 x^{3} + 1440 x^{2} + 1320 x - 390}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.4

Factor $30$ out of $- 90 x^{4} - 120 x^{3} + 1440 x^{2} + 1320 x - 390$ .

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Step 2.12.4.1

Factor $30$ out of $- 90 x^{4}$ .

$f'' (x) = \frac{30 (- 3 x^{4}) - 120 x^{3} + 1440 x^{2} + 1320 x - 390}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.4.2

Factor $30$ out of $- 120 x^{3}$ .

$f'' (x) = \frac{30 (- 3 x^{4}) + 30 (- 4 x^{3}) + 1440 x^{2} + 1320 x - 390}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.4.3

Factor $30$ out of $1440 x^{2}$ .

$f'' (x) = \frac{30 (- 3 x^{4}) + 30 (- 4 x^{3}) + 30 (48 x^{2}) + 1320 x - 390}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.4.4

Factor $30$ out of $1320 x$ .

$f'' (x) = \frac{30 (- 3 x^{4}) + 30 (- 4 x^{3}) + 30 (48 x^{2}) + 30 (44 x) - 390}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.4.5

Factor $30$ out of $- 390$ .

$f'' (x) = \frac{30 (- 3 x^{4}) + 30 (- 4 x^{3}) + 30 (48 x^{2}) + 30 (44 x) + 30 (- 13)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.4.6

Factor $30$ out of $30 (- 3 x^{4}) + 30 (- 4 x^{3})$ .

$f'' (x) = \frac{30 (- 3 x^{4} - 4 x^{3}) + 30 (48 x^{2}) + 30 (44 x) + 30 (- 13)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.4.7

Factor $30$ out of $30 (- 3 x^{4} - 4 x^{3}) + 30 (48 x^{2})$ .

$f'' (x) = \frac{30 (- 3 x^{4} - 4 x^{3} + 48 x^{2}) + 30 (44 x) + 30 (- 13)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.4.8

Factor $30$ out of $30 (- 3 x^{4} - 4 x^{3} + 48 x^{2}) + 30 (44 x)$ .

$f'' (x) = \frac{30 (- 3 x^{4} - 4 x^{3} + 48 x^{2} + 44 x) + 30 (- 13)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.4.9

Factor $30$ out of $30 (- 3 x^{4} - 4 x^{3} + 48 x^{2} + 44 x) + 30 (- 13)$ .

$f'' (x) = \frac{30 (- 3 x^{4} - 4 x^{3} + 48 x^{2} + 44 x - 13)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.5

Factor $- 1$ out of $- 3 x^{4}$ .

$f'' (x) = \frac{30 (- (3 x^{4}) - 4 x^{3} + 48 x^{2} + 44 x - 13)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.6

Factor $- 1$ out of $- 4 x^{3}$ .

$f'' (x) = \frac{30 (- (3 x^{4}) - (4 x^{3}) + 48 x^{2} + 44 x - 13)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.7

Factor $- 1$ out of $- (3 x^{4}) - (4 x^{3})$ .

$f'' (x) = \frac{30 (- (3 x^{4} + 4 x^{3}) + 48 x^{2} + 44 x - 13)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.8

Factor $- 1$ out of $48 x^{2}$ .

$f'' (x) = \frac{30 (- (3 x^{4} + 4 x^{3}) - (- 48 x^{2}) + 44 x - 13)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.9

Factor $- 1$ out of $- (3 x^{4} + 4 x^{3}) - (- 48 x^{2})$ .

$f'' (x) = \frac{30 (- (3 x^{4} + 4 x^{3} - 48 x^{2}) + 44 x - 13)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.10

Factor $- 1$ out of $44 x$ .

$f'' (x) = \frac{30 (- (3 x^{4} + 4 x^{3} - 48 x^{2}) - (- 44 x) - 13)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.11

Factor $- 1$ out of $- (3 x^{4} + 4 x^{3} - 48 x^{2}) - (- 44 x)$ .

$f'' (x) = \frac{30 (- (3 x^{4} + 4 x^{3} - 48 x^{2} - 44 x) - 13)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.12

Rewrite $- 13$ as $- 1 (13)$ .

$f'' (x) = \frac{30 (- (3 x^{4} + 4 x^{3} - 48 x^{2} - 44 x) - 1 \cdot 13)}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.13

Factor $- 1$ out of $- (3 x^{4} + 4 x^{3} - 48 x^{2} - 44 x) - 1 (13)$ .

$f'' (x) = \frac{30 (- (3 x^{4} + 4 x^{3} - 48 x^{2} - 44 x + 13))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.14

Rewrite $- (3 x^{4} + 4 x^{3} - 48 x^{2} - 44 x + 13)$ as $- 1 (3 x^{4} + 4 x^{3} - 48 x^{2} - 44 x + 13)$ .

$f'' (x) = \frac{30 (- 1 (3 x^{4} + 4 x^{3} - 48 x^{2} - 44 x + 13))}{{(x^{2} + x + 3)}^{4}}$

Step 2.12.15

Move the negative in front of the fraction.

$f'' (x) = - \frac{30 (3 x^{4} + 4 x^{3} - 48 x^{2} - 44 x + 13)}{{(x^{2} + x + 3)}^{4}}$

Step 3

To find the local maximum and minimum values of the function, set the derivative equal to $0$ and solve.

$\frac{10 (3 x^{3} + 3 x^{2} - 24 x - 11)}{{(x^{2} + x + 3)}^{3}} = 0$

Step 4

Find the first derivative.

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Step 4.1

Find the first derivative.

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Step 4.1.1

$- \frac{d}{d x} [\frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}}] + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 4.1.2

Step 4.1.3

Differentiate.

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Step 4.1.3.1

Multiply the exponents in ${({(x^{2} + x + 3)}^{2})}^{2}$ .

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Step 4.1.3.1.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

Step 4.1.3.1.2

Multiply $2$ by $2$ .

Step 4.1.3.2

By the Sum Rule, the derivative of $15 x^{2} + 10 x - 40$ with respect to $x$ is $\frac{d}{d x} [15 x^{2}] + \frac{d}{d x} [10 x] + \frac{d}{d x} [- 40]$ .

Step 4.1.3.3

Since $15$ is constant with respect to $x$ , the derivative of $15 x^{2}$ with respect to $x$ is $15 \frac{d}{d x} [x^{2}]$ .

Step 4.1.3.4

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 2$ .

Step 4.1.3.5

Multiply $2$ by $15$ .

Step 4.1.3.6

Since $10$ is constant with respect to $x$ , the derivative of $10 x$ with respect to $x$ is $10 \frac{d}{d x} [x]$ .

Step 4.1.3.7

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 1$ .

Step 4.1.3.8

Multiply $10$ by $1$ .

Step 4.1.3.9

Since $- 40$ is constant with respect to $x$ , the derivative of $- 40$ with respect to $x$ is $0$ .

Step 4.1.3.10

Add $30 x + 10$ and $0$ .

Step 4.1.4

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = x^{2}$ and $g (x) = x^{2} + x + 3$ .

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Step 4.1.4.1

To apply the Chain Rule, set $u$ as $x^{2} + x + 3$ .

Step 4.1.4.2

Differentiate using the Power Rule which states that $\frac{d}{d u} [u^{n}]$ is $n u^{n - 1}$ where $n = 2$ .

Step 4.1.4.3

Replace all occurrences of $u$ with $x^{2} + x + 3$ .

Step 4.1.5

Simplify with factoring out.

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Step 4.1.5.1

Multiply $2$ by $- 1$ .

Step 4.1.5.2

Factor $x^{2} + x + 3$ out of ${(x^{2} + x + 3)}^{2} (30 x + 10) - 2 (15 x^{2} + 10 x - 40) ((x^{2} + x + 3) \frac{d}{d x} [x^{2} + x + 3])$ .

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Step 4.1.5.2.1

Factor $x^{2} + x + 3$ out of ${(x^{2} + x + 3)}^{2} (30 x + 10)$ .

Step 4.1.5.2.2

Factor $x^{2} + x + 3$ out of $- 2 (15 x^{2} + 10 x - 40) ((x^{2} + x + 3) \frac{d}{d x} [x^{2} + x + 3])$ .

Step 4.1.5.2.3

Factor $x^{2} + x + 3$ out of $(x^{2} + x + 3) ((x^{2} + x + 3) (30 x + 10)) + (x^{2} + x + 3) (- 2 (15 x^{2} + 10 x - 40) (\frac{d}{d x} [x^{2} + x + 3]))$ .

Step 4.1.6

Cancel the common factors.

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Step 4.1.6.1

Factor $x^{2} + x + 3$ out of ${(x^{2} + x + 3)}^{4}$ .

Step 4.1.6.2

Cancel the common factor.

Step 4.1.6.3

Rewrite the expression.

$- \frac{(x^{2} + x + 3) (30 x + 10) - 2 (15 x^{2} + 10 x - 40) (\frac{d}{d x} [x^{2} + x + 3])}{{(x^{2} + x + 3)}^{3}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 4.1.7

By the Sum Rule, the derivative of $x^{2} + x + 3$ with respect to $x$ is $\frac{d}{d x} [x^{2}] + \frac{d}{d x} [x] + \frac{d}{d x} [3]$ .

Step 4.1.8

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 2$ .

Step 4.1.9

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 1$ .

$- \frac{(x^{2} + x + 3) (30 x + 10) - 2 (15 x^{2} + 10 x - 40) (2 x + 1 + \frac{d}{d x} [3])}{{(x^{2} + x + 3)}^{3}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 4.1.10

Since $3$ is constant with respect to $x$ , the derivative of $3$ with respect to $x$ is $0$ .

$- \frac{(x^{2} + x + 3) (30 x + 10) - 2 (15 x^{2} + 10 x - 40) (2 x + 1 + 0)}{{(x^{2} + x + 3)}^{3}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 4.1.11

Add $2 x + 1$ and $0$ .

$- \frac{(x^{2} + x + 3) (30 x + 10) - 2 (15 x^{2} + 10 x - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \frac{d}{d x} [- 1]$

Step 4.1.12

Since $- 1$ is constant with respect to $x$ , the derivative of $- 1$ with respect to $x$ is $0$ .

$- \frac{(x^{2} + x + 3) (30 x + 10) - 2 (15 x^{2} + 10 x - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}} + \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}} \cdot 0$

Step 4.1.13

Simplify the expression.

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Step 4.1.13.1

Multiply $\frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}}$ by $0$ .

$- \frac{(x^{2} + x + 3) (30 x + 10) - 2 (15 x^{2} + 10 x - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}} + 0$

Step 4.1.13.2

Add $- \frac{(x^{2} + x + 3) (30 x + 10) - 2 (15 x^{2} + 10 x - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$ and $0$ .

$- \frac{(x^{2} + x + 3) (30 x + 10) - 2 (15 x^{2} + 10 x - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14

Simplify.

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Step 4.1.14.1

Apply the distributive property.

$- \frac{(x^{2} + x + 3) (30 x + 10) + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2

Simplify the numerator.

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Step 4.1.14.2.1

Simplify each term.

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Step 4.1.14.2.1.1

Expand $(x^{2} + x + 3) (30 x + 10)$ by multiplying each term in the first expression by each term in the second expression.

$- \frac{x^{2} (30 x) + x^{2} \cdot 10 + x (30 x) + x \cdot 10 + 3 (30 x) + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.2

Simplify each term.

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Step 4.1.14.2.1.2.1

Rewrite using the commutative property of multiplication.

$- \frac{30 x^{2} x + x^{2} \cdot 10 + x (30 x) + x \cdot 10 + 3 (30 x) + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.2.2

Multiply $x^{2}$ by $x$ by adding the exponents.

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Step 4.1.14.2.1.2.2.1

Move $x$ .

$- \frac{30 (x \cdot x^{2}) + x^{2} \cdot 10 + x (30 x) + x \cdot 10 + 3 (30 x) + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.2.2.2

Multiply $x$ by $x^{2}$ .

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Step 4.1.14.2.1.2.2.2.1

Raise $x$ to the power of $1$ .

$- \frac{30 (x^{1} x^{2}) + x^{2} \cdot 10 + x (30 x) + x \cdot 10 + 3 (30 x) + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.2.2.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$- \frac{30 x^{1 + 2} + x^{2} \cdot 10 + x (30 x) + x \cdot 10 + 3 (30 x) + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.2.2.3

Add $1$ and $2$ .

$- \frac{30 x^{3} + x^{2} \cdot 10 + x (30 x) + x \cdot 10 + 3 (30 x) + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.2.3

Move $10$ to the left of $x^{2}$ .

$- \frac{30 x^{3} + 10 \cdot x^{2} + x (30 x) + x \cdot 10 + 3 (30 x) + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.2.4

Rewrite using the commutative property of multiplication.

$- \frac{30 x^{3} + 10 x^{2} + 30 x \cdot x + x \cdot 10 + 3 (30 x) + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.2.5

Multiply $x$ by $x$ by adding the exponents.

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Step 4.1.14.2.1.2.5.1

Move $x$ .

$- \frac{30 x^{3} + 10 x^{2} + 30 (x \cdot x) + x \cdot 10 + 3 (30 x) + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.2.5.2

Multiply $x$ by $x$ .

$- \frac{30 x^{3} + 10 x^{2} + 30 x^{2} + x \cdot 10 + 3 (30 x) + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.2.6

Move $10$ to the left of $x$ .

$- \frac{30 x^{3} + 10 x^{2} + 30 x^{2} + 10 \cdot x + 3 (30 x) + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.2.7

Multiply $30$ by $3$ .

$- \frac{30 x^{3} + 10 x^{2} + 30 x^{2} + 10 x + 90 x + 3 \cdot 10 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.2.8

Multiply $3$ by $10$ .

$- \frac{30 x^{3} + 10 x^{2} + 30 x^{2} + 10 x + 90 x + 30 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.3

Add $10 x^{2}$ and $30 x^{2}$ .

$- \frac{30 x^{3} + 40 x^{2} + 10 x + 90 x + 30 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.4

Add $10 x$ and $90 x$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 + (- 2 (15 x^{2}) - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.5

Simplify each term.

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Step 4.1.14.2.1.5.1

Multiply $15$ by $- 2$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 + (- 30 x^{2} - 2 (10 x) - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.5.2

Multiply $10$ by $- 2$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 + (- 30 x^{2} - 20 x - 2 \cdot - 40) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.5.3

Multiply $- 2$ by $- 40$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 + (- 30 x^{2} - 20 x + 80) (2 x + 1)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.6

Expand $(- 30 x^{2} - 20 x + 80) (2 x + 1)$ by multiplying each term in the first expression by each term in the second expression.

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 30 x^{2} (2 x) - 30 x^{2} \cdot 1 - 20 x (2 x) - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.7

Simplify each term.

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Step 4.1.14.2.1.7.1

Rewrite using the commutative property of multiplication.

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 30 \cdot 2 x^{2} x - 30 x^{2} \cdot 1 - 20 x (2 x) - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.7.2

Multiply $x^{2}$ by $x$ by adding the exponents.

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Step 4.1.14.2.1.7.2.1

Move $x$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 30 \cdot 2 (x \cdot x^{2}) - 30 x^{2} \cdot 1 - 20 x (2 x) - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.7.2.2

Multiply $x$ by $x^{2}$ .

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Step 4.1.14.2.1.7.2.2.1

Raise $x$ to the power of $1$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 30 \cdot 2 (x^{1} x^{2}) - 30 x^{2} \cdot 1 - 20 x (2 x) - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.7.2.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 30 \cdot 2 x^{1 + 2} - 30 x^{2} \cdot 1 - 20 x (2 x) - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.7.2.3

Add $1$ and $2$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 30 \cdot 2 x^{3} - 30 x^{2} \cdot 1 - 20 x (2 x) - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.7.3

Multiply $- 30$ by $2$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 60 x^{3} - 30 x^{2} \cdot 1 - 20 x (2 x) - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.7.4

Multiply $- 30$ by $1$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 60 x^{3} - 30 x^{2} - 20 x (2 x) - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.7.5

Rewrite using the commutative property of multiplication.

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 60 x^{3} - 30 x^{2} - 20 \cdot 2 x \cdot x - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.7.6

Multiply $x$ by $x$ by adding the exponents.

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Step 4.1.14.2.1.7.6.1

Move $x$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 60 x^{3} - 30 x^{2} - 20 \cdot 2 (x \cdot x) - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.7.6.2

Multiply $x$ by $x$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 60 x^{3} - 30 x^{2} - 20 \cdot 2 x^{2} - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.7.7

Multiply $- 20$ by $2$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 60 x^{3} - 30 x^{2} - 40 x^{2} - 20 x \cdot 1 + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.7.8

Multiply $- 20$ by $1$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 60 x^{3} - 30 x^{2} - 40 x^{2} - 20 x + 80 (2 x) + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.7.9

Multiply $2$ by $80$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 60 x^{3} - 30 x^{2} - 40 x^{2} - 20 x + 160 x + 80 \cdot 1}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.7.10

Multiply $80$ by $1$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 60 x^{3} - 30 x^{2} - 40 x^{2} - 20 x + 160 x + 80}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.8

Subtract $40 x^{2}$ from $- 30 x^{2}$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 60 x^{3} - 70 x^{2} - 20 x + 160 x + 80}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.1.9

Add $- 20 x$ and $160 x$ .

$- \frac{30 x^{3} + 40 x^{2} + 100 x + 30 - 60 x^{3} - 70 x^{2} + 140 x + 80}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.2

Subtract $60 x^{3}$ from $30 x^{3}$ .

$- \frac{- 30 x^{3} + 40 x^{2} + 100 x + 30 - 70 x^{2} + 140 x + 80}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.3

Subtract $70 x^{2}$ from $40 x^{2}$ .

$- \frac{- 30 x^{3} - 30 x^{2} + 100 x + 30 + 140 x + 80}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.4

Add $100 x$ and $140 x$ .

$- \frac{- 30 x^{3} - 30 x^{2} + 240 x + 30 + 80}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.2.5

Add $30$ and $80$ .

$- \frac{- 30 x^{3} - 30 x^{2} + 240 x + 110}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.3

Factor $10$ out of $- 30 x^{3} - 30 x^{2} + 240 x + 110$ .

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Step 4.1.14.3.1

Factor $10$ out of $- 30 x^{3}$ .

$- \frac{10 (- 3 x^{3}) - 30 x^{2} + 240 x + 110}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.3.2

Factor $10$ out of $- 30 x^{2}$ .

$- \frac{10 (- 3 x^{3}) + 10 (- 3 x^{2}) + 240 x + 110}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.3.3

Factor $10$ out of $240 x$ .

$- \frac{10 (- 3 x^{3}) + 10 (- 3 x^{2}) + 10 (24 x) + 110}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.3.4

Factor $10$ out of $110$ .

$- \frac{10 (- 3 x^{3}) + 10 (- 3 x^{2}) + 10 (24 x) + 10 (11)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.3.5

Factor $10$ out of $10 (- 3 x^{3}) + 10 (- 3 x^{2})$ .

$- \frac{10 (- 3 x^{3} - 3 x^{2}) + 10 (24 x) + 10 (11)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.3.6

Factor $10$ out of $10 (- 3 x^{3} - 3 x^{2}) + 10 (24 x)$ .

$- \frac{10 (- 3 x^{3} - 3 x^{2} + 24 x) + 10 (11)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.3.7

Factor $10$ out of $10 (- 3 x^{3} - 3 x^{2} + 24 x) + 10 (11)$ .

$- \frac{10 (- 3 x^{3} - 3 x^{2} + 24 x + 11)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.4

Factor $- 1$ out of $- 3 x^{3}$ .

$- \frac{10 (- (3 x^{3}) - 3 x^{2} + 24 x + 11)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.5

Factor $- 1$ out of $- 3 x^{2}$ .

$- \frac{10 (- (3 x^{3}) - (3 x^{2}) + 24 x + 11)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.6

Factor $- 1$ out of $- (3 x^{3}) - (3 x^{2})$ .

$- \frac{10 (- (3 x^{3} + 3 x^{2}) + 24 x + 11)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.7

Factor $- 1$ out of $24 x$ .

$- \frac{10 (- (3 x^{3} + 3 x^{2}) - (- 24 x) + 11)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.8

Factor $- 1$ out of $- (3 x^{3} + 3 x^{2}) - (- 24 x)$ .

$- \frac{10 (- (3 x^{3} + 3 x^{2} - 24 x) + 11)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.9

Rewrite $11$ as $- 1 (- 11)$ .

$- \frac{10 (- (3 x^{3} + 3 x^{2} - 24 x) - 1 (- 11))}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.10

Factor $- 1$ out of $- (3 x^{3} + 3 x^{2} - 24 x) - 1 (- 11)$ .

$- \frac{10 (- (3 x^{3} + 3 x^{2} - 24 x - 11))}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.11

Rewrite $- (3 x^{3} + 3 x^{2} - 24 x - 11)$ as $- 1 (3 x^{3} + 3 x^{2} - 24 x - 11)$ .

$- \frac{10 (- 1 (3 x^{3} + 3 x^{2} - 24 x - 11))}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.12

Move the negative in front of the fraction.

$- - \frac{10 (3 x^{3} + 3 x^{2} - 24 x - 11)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.13

Multiply $- 1$ by $- 1$ .

$1 \frac{10 (3 x^{3} + 3 x^{2} - 24 x - 11)}{{(x^{2} + x + 3)}^{3}}$

Step 4.1.14.14

Multiply $\frac{10 (3 x^{3} + 3 x^{2} - 24 x - 11)}{{(x^{2} + x + 3)}^{3}}$ by $1$ .

$f' (x) = \frac{10 (3 x^{3} + 3 x^{2} - 24 x - 11)}{{(x^{2} + x + 3)}^{3}}$

Step 4.2

The first derivative of $f (x)$ with respect to $x$ is $\frac{10 (3 x^{3} + 3 x^{2} - 24 x - 11)}{{(x^{2} + x + 3)}^{3}}$ .

$\frac{10 (3 x^{3} + 3 x^{2} - 24 x - 11)}{{(x^{2} + x + 3)}^{3}}$

Step 5

Set the first derivative equal to $0$ then solve the equation $\frac{10 (3 x^{3} + 3 x^{2} - 24 x - 11)}{{(x^{2} + x + 3)}^{3}} = 0$ .

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Step 5.1

Set the first derivative equal to $0$ .

$\frac{10 (3 x^{3} + 3 x^{2} - 24 x - 11)}{{(x^{2} + x + 3)}^{3}} = 0$

Step 5.2

Graph each side of the equation. The solution is the x-value of the point of intersection.

$x \approx - 3.16283747, - 0.44460978, 2.60744726$

Step 6

Find the values where the derivative is undefined.

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Step 6.1

The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.

Step 7

Critical points to evaluate.

$x = - 3.16283747, - 0.44460978, 2.60744726$

Step 8

Evaluate the second derivative at $x = - 3.16283747$ . If the second derivative is positive, then this is a local minimum. If it is negative, then this is a local maximum.

$- \frac{30 (3 {(- 3.16283747)}^{4} + 4 {(- 3.16283747)}^{3} - 48 {(- 3.16283747)}^{2} - 44 \cdot - 3.16283747 + 13)}{{({(- 3.16283747)}^{2} - 3.16283747 + 3)}^{4}}$

Step 9

Evaluate the second derivative.

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Step 9.1

Remove parentheses.

$- \frac{30 (3 {(- 3.16283747)}^{4} + 4 {(- 3.16283747)}^{3} - 48 {(- 3.16283747)}^{2} - 44 \cdot - 3.16283747 + 13)}{{({(- 3.16283747)}^{2} - 3.16283747 + 3)}^{4}}$

Step 9.2

Simplify the numerator.

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Step 9.2.1

Raise $- 3.16283747$ to the power of $4$ .

$- \frac{30 (3 \cdot 100.07083047 + 4 {(- 3.16283747)}^{3} - 48 {(- 3.16283747)}^{2} - 44 \cdot - 3.16283747 + 13)}{{({(- 3.16283747)}^{2} - 3.16283747 + 3)}^{4}}$

Step 9.2.2

Multiply $3$ by $100.07083047$ .

$- \frac{30 (300.21249141 + 4 {(- 3.16283747)}^{3} - 48 {(- 3.16283747)}^{2} - 44 \cdot - 3.16283747 + 13)}{{({(- 3.16283747)}^{2} - 3.16283747 + 3)}^{4}}$

Step 9.2.3

Raise $- 3.16283747$ to the power of $3$ .

$- \frac{30 (300.21249141 + 4 \cdot - 31.63957403 - 48 {(- 3.16283747)}^{2} - 44 \cdot - 3.16283747 + 13)}{{({(- 3.16283747)}^{2} - 3.16283747 + 3)}^{4}}$

Step 9.2.4

Multiply $4$ by $- 31.63957403$ .

$- \frac{30 (300.21249141 - 126.55829614 - 48 {(- 3.16283747)}^{2} - 44 \cdot - 3.16283747 + 13)}{{({(- 3.16283747)}^{2} - 3.16283747 + 3)}^{4}}$

Step 9.2.5

Raise $- 3.16283747$ to the power of $2$ .

$- \frac{30 (300.21249141 - 126.55829614 - 48 \cdot 10.00354089 - 44 \cdot - 3.16283747 + 13)}{{({(- 3.16283747)}^{2} - 3.16283747 + 3)}^{4}}$

Step 9.2.6

Multiply $- 48$ by $10.00354089$ .

$- \frac{30 (300.21249141 - 126.55829614 - 480.16996303 - 44 \cdot - 3.16283747 + 13)}{{({(- 3.16283747)}^{2} - 3.16283747 + 3)}^{4}}$

Step 9.2.7

Multiply $- 44$ by $- 3.16283747$ .

$- \frac{30 (300.21249141 - 126.55829614 - 480.16996303 + 139.16484892 + 13)}{{({(- 3.16283747)}^{2} - 3.16283747 + 3)}^{4}}$

Step 9.2.8

Subtract $126.55829614$ from $300.21249141$ .

$- \frac{30 (173.65419526 - 480.16996303 + 139.16484892 + 13)}{{({(- 3.16283747)}^{2} - 3.16283747 + 3)}^{4}}$

Step 9.2.9

Subtract $480.16996303$ from $173.65419526$ .

$- \frac{30 (- 306.51576777 + 139.16484892 + 13)}{{({(- 3.16283747)}^{2} - 3.16283747 + 3)}^{4}}$

Step 9.2.10

Add $- 306.51576777$ and $139.16484892$ .

$- \frac{30 (- 167.35091884 + 13)}{{({(- 3.16283747)}^{2} - 3.16283747 + 3)}^{4}}$

Step 9.2.11

Add $- 167.35091884$ and $13$ .

$- \frac{30 \cdot - 154.35091884}{{({(- 3.16283747)}^{2} - 3.16283747 + 3)}^{4}}$

Step 9.3

Simplify the denominator.

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Step 9.3.1

Raise $- 3.16283747$ to the power of $2$ .

$- \frac{30 \cdot - 154.35091884}{{(10.00354089 - 3.16283747 + 3)}^{4}}$

Step 9.3.2

Subtract $3.16283747$ from $10.00354089$ .

$- \frac{30 \cdot - 154.35091884}{{(6.84070342 + 3)}^{4}}$

Step 9.3.3

Add $6.84070342$ and $3$ .

$- \frac{30 \cdot - 154.35091884}{{9.84070342}^{4}}$

Step 9.3.4

Raise $9.84070342$ to the power of $4$ .

$- \frac{30 \cdot - 154.35091884}{9377.87787987}$

Step 9.4

Simplify the expression.

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Step 9.4.1

Multiply $30$ by $- 154.35091884$ .

$- \frac{- 4630.5275654}{9377.87787987}$

Step 9.4.2

Divide $- 4630.5275654$ by $9377.87787987$ .

$- - 0.49377136$

Step 9.4.3

Multiply $- 1$ by $- 0.49377136$ .

$0.49377136$

Step 10

$x = - 3.16283747$ is a local minimum because the value of the second derivative is positive. This is referred to as the second derivative test.

$x = - 3.16283747$ is a local minimum

Step 11

Find the y-value when $x = - 3.16283747$ .

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Step 11.1

Replace the variable $x$ with $- 3.16283747$ in the expression.

$f (- 3.16283747) = - \frac{15 {(- 3.16283747)}^{2} + 10 (- 3.16283747) - 40}{{({(- 3.16283747)}^{2} - 3.16283747 + 3)}^{2}}$

Step 11.2

Simplify the result.

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Step 11.2.1

Remove parentheses.

$f (- 3.16283747) = - \frac{15 {(- 3.16283747)}^{2} + 10 (- 3.16283747) - 40}{{({(- 3.16283747)}^{2} - 3.16283747 + 3)}^{2}}$

Step 11.2.2

Simplify the numerator.

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Step 11.2.2.1

Raise $- 3.16283747$ to the power of $2$ .

$f (- 3.16283747) = - \frac{15 \cdot 10.00354089 + 10 (- 3.16283747) - 40}{{({(- 3.16283747)}^{2} - 3.16283747 + 3)}^{2}}$

Step 11.2.2.2

Multiply $15$ by $10.00354089$ .

$f (- 3.16283747) = - \frac{150.05311344 + 10 (- 3.16283747) - 40}{{({(- 3.16283747)}^{2} - 3.16283747 + 3)}^{2}}$

Step 11.2.2.3

Multiply $10$ by $- 3.16283747$ .

$f (- 3.16283747) = - \frac{150.05311344 - 31.62837475 - 40}{{({(- 3.16283747)}^{2} - 3.16283747 + 3)}^{2}}$

Step 11.2.2.4

Subtract $31.62837475$ from $150.05311344$ .

$f (- 3.16283747) = - \frac{118.42473869 - 40}{{({(- 3.16283747)}^{2} - 3.16283747 + 3)}^{2}}$

Step 11.2.2.5

Subtract $40$ from $118.42473869$ .

$f (- 3.16283747) = - \frac{78.42473869}{{({(- 3.16283747)}^{2} - 3.16283747 + 3)}^{2}}$

Step 11.2.3

Simplify the denominator.

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Step 11.2.3.1

Raise $- 3.16283747$ to the power of $2$ .

$f (- 3.16283747) = - \frac{78.42473869}{{(10.00354089 - 3.16283747 + 3)}^{2}}$

Step 11.2.3.2

Subtract $3.16283747$ from $10.00354089$ .

$f (- 3.16283747) = - \frac{78.42473869}{{(6.84070342 + 3)}^{2}}$

Step 11.2.3.3

Add $6.84070342$ and $3$ .

$f (- 3.16283747) = - \frac{78.42473869}{{9.84070342}^{2}}$

Step 11.2.3.4

Raise $9.84070342$ to the power of $2$ .

$f (- 3.16283747) = - \frac{78.42473869}{96.83944382}$

Step 11.2.4

Simplify the expression.

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Step 11.2.4.1

Divide $78.42473869$ by $96.83944382$ .

$f (- 3.16283747) = - 1 \cdot 0.80984292$

Step 11.2.4.2

Multiply $- 1$ by $0.80984292$ .

$f (- 3.16283747) = - 0.80984292$

Step 11.2.5

The final answer is $- 0.80984292$ .

$y = - 0.80984292$

Step 12

Evaluate the second derivative at $x = - 0.44460978$ . If the second derivative is positive, then this is a local minimum. If it is negative, then this is a local maximum.

$- \frac{30 (3 {(- 0.44460978)}^{4} + 4 {(- 0.44460978)}^{3} - 48 {(- 0.44460978)}^{2} - 44 \cdot - 0.44460978 + 13)}{{({(- 0.44460978)}^{2} - 0.44460978 + 3)}^{4}}$

Step 13

Evaluate the second derivative.

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Step 13.1

Remove parentheses.

$- \frac{30 (3 {(- 0.44460978)}^{4} + 4 {(- 0.44460978)}^{3} - 48 {(- 0.44460978)}^{2} - 44 \cdot - 0.44460978 + 13)}{{({(- 0.44460978)}^{2} - 0.44460978 + 3)}^{4}}$

Step 13.2

Simplify the numerator.

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Step 13.2.1

Raise $- 0.44460978$ to the power of $4$ .

$- \frac{30 (3 \cdot 0.03907653 + 4 {(- 0.44460978)}^{3} - 48 {(- 0.44460978)}^{2} - 44 \cdot - 0.44460978 + 13)}{{({(- 0.44460978)}^{2} - 0.44460978 + 3)}^{4}}$

Step 13.2.2

Multiply $3$ by $0.03907653$ .

$- \frac{30 (0.11722961 + 4 {(- 0.44460978)}^{3} - 48 {(- 0.44460978)}^{2} - 44 \cdot - 0.44460978 + 13)}{{({(- 0.44460978)}^{2} - 0.44460978 + 3)}^{4}}$

Step 13.2.3

Raise $- 0.44460978$ to the power of $3$ .

$- \frac{30 (0.11722961 + 4 \cdot - 0.08788951 - 48 {(- 0.44460978)}^{2} - 44 \cdot - 0.44460978 + 13)}{{({(- 0.44460978)}^{2} - 0.44460978 + 3)}^{4}}$

Step 13.2.4

Multiply $4$ by $- 0.08788951$ .

$- \frac{30 (0.11722961 - 0.35155805 - 48 {(- 0.44460978)}^{2} - 44 \cdot - 0.44460978 + 13)}{{({(- 0.44460978)}^{2} - 0.44460978 + 3)}^{4}}$

Step 13.2.5

Raise $- 0.44460978$ to the power of $2$ .

$- \frac{30 (0.11722961 - 0.35155805 - 48 \cdot 0.19767786 - 44 \cdot - 0.44460978 + 13)}{{({(- 0.44460978)}^{2} - 0.44460978 + 3)}^{4}}$

Step 13.2.6

Multiply $- 48$ by $0.19767786$ .

$- \frac{30 (0.11722961 - 0.35155805 - 9.48853751 - 44 \cdot - 0.44460978 + 13)}{{({(- 0.44460978)}^{2} - 0.44460978 + 3)}^{4}}$

Step 13.2.7

Multiply $- 44$ by $- 0.44460978$ .

$- \frac{30 (0.11722961 - 0.35155805 - 9.48853751 + 19.56283073 + 13)}{{({(- 0.44460978)}^{2} - 0.44460978 + 3)}^{4}}$

Step 13.2.8

Subtract $0.35155805$ from $0.11722961$ .

$- \frac{30 (- 0.23432844 - 9.48853751 + 19.56283073 + 13)}{{({(- 0.44460978)}^{2} - 0.44460978 + 3)}^{4}}$

Step 13.2.9

Subtract $9.48853751$ from $- 0.23432844$ .

$- \frac{30 (- 9.72286595 + 19.56283073 + 13)}{{({(- 0.44460978)}^{2} - 0.44460978 + 3)}^{4}}$

Step 13.2.10

Add $- 9.72286595$ and $19.56283073$ .

$- \frac{30 (9.83996478 + 13)}{{({(- 0.44460978)}^{2} - 0.44460978 + 3)}^{4}}$

Step 13.2.11

Add $9.83996478$ and $13$ .

$- \frac{30 \cdot 22.83996478}{{({(- 0.44460978)}^{2} - 0.44460978 + 3)}^{4}}$

Step 13.3

Simplify the denominator.

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Step 13.3.1

Raise $- 0.44460978$ to the power of $2$ .

$- \frac{30 \cdot 22.83996478}{{(0.19767786 - 0.44460978 + 3)}^{4}}$

Step 13.3.2

Subtract $0.44460978$ from $0.19767786$ .

$- \frac{30 \cdot 22.83996478}{{(- 0.24693192 + 3)}^{4}}$

Step 13.3.3

Add $- 0.24693192$ and $3$ .

$- \frac{30 \cdot 22.83996478}{{2.75306807}^{4}}$

Step 13.3.4

Raise $2.75306807$ to the power of $4$ .

$- \frac{30 \cdot 22.83996478}{57.44705921}$

Step 13.4

Simplify the expression.

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Step 13.4.1

Multiply $30$ by $22.83996478$ .

$- \frac{685.19894343}{57.44705921}$

Step 13.4.2

Divide $685.19894343$ by $57.44705921$ .

$- 1 \cdot 11.92748511$

Step 13.4.3

Multiply $- 1$ by $11.92748511$ .

$- 11.92748511$

Step 14

$x = - 0.44460978$ is a local maximum because the value of the second derivative is negative. This is referred to as the second derivative test.

$x = - 0.44460978$ is a local maximum

Step 15

Find the y-value when $x = - 0.44460978$ .

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Step 15.1

Replace the variable $x$ with $- 0.44460978$ in the expression.

$f (- 0.44460978) = - \frac{15 {(- 0.44460978)}^{2} + 10 (- 0.44460978) - 40}{{({(- 0.44460978)}^{2} - 0.44460978 + 3)}^{2}}$

Step 15.2

Simplify the result.

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Step 15.2.1

Remove parentheses.

$f (- 0.44460978) = - \frac{15 {(- 0.44460978)}^{2} + 10 (- 0.44460978) - 40}{{({(- 0.44460978)}^{2} - 0.44460978 + 3)}^{2}}$

Step 15.2.2

Simplify the numerator.

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Step 15.2.2.1

Raise $- 0.44460978$ to the power of $2$ .

$f (- 0.44460978) = - \frac{15 \cdot 0.19767786 + 10 (- 0.44460978) - 40}{{({(- 0.44460978)}^{2} - 0.44460978 + 3)}^{2}}$

Step 15.2.2.2

Multiply $15$ by $0.19767786$ .

$f (- 0.44460978) = - \frac{2.96516797 + 10 (- 0.44460978) - 40}{{({(- 0.44460978)}^{2} - 0.44460978 + 3)}^{2}}$

Step 15.2.2.3

Multiply $10$ by $- 0.44460978$ .

$f (- 0.44460978) = - \frac{2.96516797 - 4.44609789 - 40}{{({(- 0.44460978)}^{2} - 0.44460978 + 3)}^{2}}$

Step 15.2.2.4

Subtract $4.44609789$ from $2.96516797$ .

$f (- 0.44460978) = - \frac{- 1.48092992 - 40}{{({(- 0.44460978)}^{2} - 0.44460978 + 3)}^{2}}$

Step 15.2.2.5

Subtract $40$ from $- 1.48092992$ .

$f (- 0.44460978) = - \frac{- 41.48092992}{{({(- 0.44460978)}^{2} - 0.44460978 + 3)}^{2}}$

Step 15.2.3

Simplify the denominator.

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Step 15.2.3.1

Raise $- 0.44460978$ to the power of $2$ .

$f (- 0.44460978) = - \frac{- 41.48092992}{{(0.19767786 - 0.44460978 + 3)}^{2}}$

Step 15.2.3.2

Subtract $0.44460978$ from $0.19767786$ .

$f (- 0.44460978) = - \frac{- 41.48092992}{{(- 0.24693192 + 3)}^{2}}$

Step 15.2.3.3

Add $- 0.24693192$ and $3$ .

$f (- 0.44460978) = - \frac{- 41.48092992}{{2.75306807}^{2}}$

Step 15.2.3.4

Raise $2.75306807$ to the power of $2$ .

$f (- 0.44460978) = - \frac{- 41.48092992}{7.57938382}$

Step 15.2.4

Simplify the expression.

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Step 15.2.4.1

Divide $- 41.48092992$ by $7.57938382$ .

$f (- 0.44460978) = 5.47286308$

Step 15.2.4.2

Multiply $- 1$ by $- 5.47286308$ .

$f (- 0.44460978) = 5.47286308$

Step 15.2.5

The final answer is $5.47286308$ .

$y = 5.47286308$

Step 16

Evaluate the second derivative at $x = 2.60744726$ . If the second derivative is positive, then this is a local minimum. If it is negative, then this is a local maximum.

$- \frac{30 (3 {(2.60744726)}^{4} + 4 {(2.60744726)}^{3} - 48 {(2.60744726)}^{2} - 44 \cdot 2.60744726 + 13)}{{({(2.60744726)}^{2} + 2.60744726 + 3)}^{4}}$

Step 17

Evaluate the second derivative.

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Step 17.1

Remove parentheses.

$- \frac{30 (3 {(2.60744726)}^{4} + 4 {(2.60744726)}^{3} - 48 {(2.60744726)}^{2} - 44 \cdot 2.60744726 + 13)}{{({(2.60744726)}^{2} + 2.60744726 + 3)}^{4}}$

Step 17.2

Simplify the numerator.

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Step 17.2.1

Raise $2.60744726$ to the power of $4$ .

$- \frac{30 (3 \cdot 46.22342645 + 4 \cdot {2.60744726}^{3} - 48 \cdot {2.60744726}^{2} - 44 \cdot 2.60744726 + 13)}{{({2.60744726}^{2} + 2.60744726 + 3)}^{4}}$

Step 17.2.2

Multiply $3$ by $46.22342645$ .

$- \frac{30 (138.67027937 + 4 \cdot {2.60744726}^{3} - 48 \cdot {2.60744726}^{2} - 44 \cdot 2.60744726 + 13)}{{({2.60744726}^{2} + 2.60744726 + 3)}^{4}}$

Step 17.2.3

Raise $2.60744726$ to the power of $3$ .

$- \frac{30 (138.67027937 + 4 \cdot 17.72746358 - 48 \cdot {2.60744726}^{2} - 44 \cdot 2.60744726 + 13)}{{({2.60744726}^{2} + 2.60744726 + 3)}^{4}}$

Step 17.2.4

Multiply $4$ by $17.72746358$ .

$- \frac{30 (138.67027937 + 70.90985432 - 48 \cdot {2.60744726}^{2} - 44 \cdot 2.60744726 + 13)}{{({2.60744726}^{2} + 2.60744726 + 3)}^{4}}$

Step 17.2.5

Raise $2.60744726$ to the power of $2$ .

$- \frac{30 (138.67027937 + 70.90985432 - 48 \cdot 6.79878124 - 44 \cdot 2.60744726 + 13)}{{({2.60744726}^{2} + 2.60744726 + 3)}^{4}}$

Step 17.2.6

Multiply $- 48$ by $6.79878124$ .

$- \frac{30 (138.67027937 + 70.90985432 - 326.3414999 - 44 \cdot 2.60744726 + 13)}{{({2.60744726}^{2} + 2.60744726 + 3)}^{4}}$

Step 17.2.7

Multiply $- 44$ by $2.60744726$ .

$- \frac{30 (138.67027937 + 70.90985432 - 326.3414999 - 114.72767972 + 13)}{{({2.60744726}^{2} + 2.60744726 + 3)}^{4}}$

Step 17.2.8

Add $138.67027937$ and $70.90985432$ .

$- \frac{30 (209.58013369 - 326.3414999 - 114.72767972 + 13)}{{({2.60744726}^{2} + 2.60744726 + 3)}^{4}}$

Step 17.2.9

Subtract $326.3414999$ from $209.58013369$ .

$- \frac{30 (- 116.7613662 - 114.72767972 + 13)}{{({2.60744726}^{2} + 2.60744726 + 3)}^{4}}$

Step 17.2.10

Subtract $114.72767972$ from $- 116.7613662$ .

$- \frac{30 (- 231.48904593 + 13)}{{({2.60744726}^{2} + 2.60744726 + 3)}^{4}}$

Step 17.2.11

Add $- 231.48904593$ and $13$ .

$- \frac{30 \cdot - 218.48904593}{{({2.60744726}^{2} + 2.60744726 + 3)}^{4}}$

Step 17.3

Simplify the denominator.

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Step 17.3.1

Raise $2.60744726$ to the power of $2$ .

$- \frac{30 \cdot - 218.48904593}{{(6.79878124 + 2.60744726 + 3)}^{4}}$

Step 17.3.2

Add $6.79878124$ and $2.60744726$ .

$- \frac{30 \cdot - 218.48904593}{{(9.40622851 + 3)}^{4}}$

Step 17.3.3

Add $9.40622851$ and $3$ .

$- \frac{30 \cdot - 218.48904593}{{12.40622851}^{4}}$

Step 17.3.4

Raise $12.40622851$ to the power of $4$ .

$- \frac{30 \cdot - 218.48904593}{23689.67514359}$

Step 17.4

Simplify the expression.

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Step 17.4.1

Multiply $30$ by $- 218.48904593$ .

$- \frac{- 6554.67137803}{23689.67514359}$

Step 17.4.2

Divide $- 6554.67137803$ by $23689.67514359$ .

$- - 0.27668895$

Step 17.4.3

Multiply $- 1$ by $- 0.27668895$ .

$0.27668895$

Step 18

$x = 2.60744726$ is a local minimum because the value of the second derivative is positive. This is referred to as the second derivative test.

$x = 2.60744726$ is a local minimum

Step 19

Find the y-value when $x = 2.60744726$ .

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Step 19.1

Replace the variable $x$ with $2.60744726$ in the expression.

$f (2.60744726) = - \frac{15 {(2.60744726)}^{2} + 10 (2.60744726) - 40}{{({(2.60744726)}^{2} + 2.60744726 + 3)}^{2}}$

Step 19.2

Simplify the result.

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Step 19.2.1

Remove parentheses.

$f (2.60744726) = - \frac{15 {(2.60744726)}^{2} + 10 (2.60744726) - 40}{{({(2.60744726)}^{2} + 2.60744726 + 3)}^{2}}$

Step 19.2.2

Simplify the numerator.

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Step 19.2.2.1

Raise $2.60744726$ to the power of $2$ .

$f (2.60744726) = - \frac{15 \cdot 6.79878124 + 10 (2.60744726) - 40}{{({2.60744726}^{2} + 2.60744726 + 3)}^{2}}$

Step 19.2.2.2

Multiply $15$ by $6.79878124$ .

$f (2.60744726) = - \frac{101.98171871 + 10 (2.60744726) - 40}{{({2.60744726}^{2} + 2.60744726 + 3)}^{2}}$

Step 19.2.2.3

Multiply $10$ by $2.60744726$ .

$f (2.60744726) = - \frac{101.98171871 + 26.07447266 - 40}{{({2.60744726}^{2} + 2.60744726 + 3)}^{2}}$

Step 19.2.2.4

Add $101.98171871$ and $26.07447266$ .

$f (2.60744726) = - \frac{128.05619138 - 40}{{({2.60744726}^{2} + 2.60744726 + 3)}^{2}}$

Step 19.2.2.5

Subtract $40$ from $128.05619138$ .

$f (2.60744726) = - \frac{88.05619138}{{({2.60744726}^{2} + 2.60744726 + 3)}^{2}}$

Step 19.2.3

Simplify the denominator.

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Step 19.2.3.1

Raise $2.60744726$ to the power of $2$ .

$f (2.60744726) = - \frac{88.05619138}{{(6.79878124 + 2.60744726 + 3)}^{2}}$

Step 19.2.3.2

Add $6.79878124$ and $2.60744726$ .

$f (2.60744726) = - \frac{88.05619138}{{(9.40622851 + 3)}^{2}}$

Step 19.2.3.3

Add $9.40622851$ and $3$ .

$f (2.60744726) = - \frac{88.05619138}{{12.40622851}^{2}}$

Step 19.2.3.4

Raise $12.40622851$ to the power of $2$ .

$f (2.60744726) = - \frac{88.05619138}{153.91450595}$

Step 19.2.4

Simplify the expression.

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Step 19.2.4.1

Divide $88.05619138$ by $153.91450595$ .

$f (2.60744726) = - 1 \cdot 0.57211106$

Step 19.2.4.2

Multiply $- 1$ by $0.57211106$ .

$f (2.60744726) = - 0.57211106$

Step 19.2.5

The final answer is $- 0.57211106$ .

$y = - 0.57211106$

Step 20

These are the local extrema for $f (x) = - \frac{15 x^{2} + 10 x - 40}{{(x^{2} + x + 3)}^{2}}$ .

$(- 3.16283747, - 0.80984292)$ is a local minima

$(- 0.44460978, 5.47286308)$ is a local maxima

$(2.60744726, - 0.57211106)$ is a local minima

Step 21