Calculus Examples

$\frac{4 - x^{2}}{3 - \sqrt{x^{2} + 5}}$

Step 1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{x^{2} + 5}$ as ${(x^{2} + 5)}^{\frac{1}{2}}$ .

$\frac{d}{d x} [\frac{4 - x^{2}}{3 - {(x^{2} + 5)}^{\frac{1}{2}}}]$

Step 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 $f (x) = 4 - x^{2}$ and $g (x) = 3 - {(x^{2} + 5)}^{\frac{1}{2}}$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) \frac{d}{d x} [4 - x^{2}] - (4 - x^{2}) \frac{d}{d x} [3 - {(x^{2} + 5)}^{\frac{1}{2}}]}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 3

Differentiate.

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Step 3.1

By the Sum Rule, the derivative of $4 - x^{2}$ with respect to $x$ is $\frac{d}{d x} [4] + \frac{d}{d x} [- x^{2}]$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (\frac{d}{d x} [4] + \frac{d}{d x} [- x^{2}]) - (4 - x^{2}) \frac{d}{d x} [3 - {(x^{2} + 5)}^{\frac{1}{2}}]}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 3.2

Since $4$ is constant with respect to $x$ , the derivative of $4$ with respect to $x$ is $0$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (0 + \frac{d}{d x} [- x^{2}]) - (4 - x^{2}) \frac{d}{d x} [3 - {(x^{2} + 5)}^{\frac{1}{2}}]}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 3.3

Add $0$ and $\frac{d}{d x} [- x^{2}]$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) \frac{d}{d x} [- x^{2}] - (4 - x^{2}) \frac{d}{d x} [3 - {(x^{2} + 5)}^{\frac{1}{2}}]}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 3.4

Since $- 1$ is constant with respect to $x$ , the derivative of $- x^{2}$ with respect to $x$ is $- \frac{d}{d x} [x^{2}]$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- \frac{d}{d x} [x^{2}]) - (4 - x^{2}) \frac{d}{d x} [3 - {(x^{2} + 5)}^{\frac{1}{2}}]}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 3.5

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

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- (2 x)) - (4 - x^{2}) \frac{d}{d x} [3 - {(x^{2} + 5)}^{\frac{1}{2}}]}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 3.6

Multiply $2$ by $- 1$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) - (4 - x^{2}) \frac{d}{d x} [3 - {(x^{2} + 5)}^{\frac{1}{2}}]}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 3.7

By the Sum Rule, the derivative of $3 - {(x^{2} + 5)}^{\frac{1}{2}}$ with respect to $x$ is $\frac{d}{d x} [3] + \frac{d}{d x} [- {(x^{2} + 5)}^{\frac{1}{2}}]$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) - (4 - x^{2}) (\frac{d}{d x} [3] + \frac{d}{d x} [- {(x^{2} + 5)}^{\frac{1}{2}}])}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 3.8

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

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) - (4 - x^{2}) (0 + \frac{d}{d x} [- {(x^{2} + 5)}^{\frac{1}{2}}])}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 3.9

Add $0$ and $\frac{d}{d x} [- {(x^{2} + 5)}^{\frac{1}{2}}]$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) - (4 - x^{2}) \frac{d}{d x} [- {(x^{2} + 5)}^{\frac{1}{2}}]}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 3.10

Since $- 1$ is constant with respect to $x$ , the derivative of $- {(x^{2} + 5)}^{\frac{1}{2}}$ with respect to $x$ is $- \frac{d}{d x} [{(x^{2} + 5)}^{\frac{1}{2}}]$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) - (4 - x^{2}) (- \frac{d}{d x} [{(x^{2} + 5)}^{\frac{1}{2}}])}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 3.11

Multiply.

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Step 3.11.1

Multiply $- 1$ by $- 1$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) + 1 (4 - x^{2}) \frac{d}{d x} [{(x^{2} + 5)}^{\frac{1}{2}}]}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 3.11.2

Multiply $4 - x^{2}$ by $1$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) + (4 - x^{2}) \frac{d}{d x} [{(x^{2} + 5)}^{\frac{1}{2}}]}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 4

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = x^{\frac{1}{2}}$ and $g (x) = x^{2} + 5$ .

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Step 4.1

To apply the Chain Rule, set $u$ as $x^{2} + 5$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) + (4 - x^{2}) (\frac{d}{d u} [u^{\frac{1}{2}}] \frac{d}{d x} [x^{2} + 5])}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 4.2

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

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) + (4 - x^{2}) (\frac{1}{2} u^{\frac{1}{2} - 1} \frac{d}{d x} [x^{2} + 5])}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 4.3

Replace all occurrences of $u$ with $x^{2} + 5$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) + (4 - x^{2}) (\frac{1}{2} {(x^{2} + 5)}^{\frac{1}{2} - 1} \frac{d}{d x} [x^{2} + 5])}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 5

To write $- 1$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) + (4 - x^{2}) (\frac{1}{2} {(x^{2} + 5)}^{\frac{1}{2} - 1 \cdot \frac{2}{2}} \frac{d}{d x} [x^{2} + 5])}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 6

Combine $- 1$ and $\frac{2}{2}$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) + (4 - x^{2}) (\frac{1}{2} {(x^{2} + 5)}^{\frac{1}{2} + \frac{- 1 \cdot 2}{2}} \frac{d}{d x} [x^{2} + 5])}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 7

Combine the numerators over the common denominator.

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) + (4 - x^{2}) (\frac{1}{2} {(x^{2} + 5)}^{\frac{1 - 1 \cdot 2}{2}} \frac{d}{d x} [x^{2} + 5])}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 8

Simplify the numerator.

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Step 8.1

Multiply $- 1$ by $2$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) + (4 - x^{2}) (\frac{1}{2} {(x^{2} + 5)}^{\frac{1 - 2}{2}} \frac{d}{d x} [x^{2} + 5])}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 8.2

Subtract $2$ from $1$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) + (4 - x^{2}) (\frac{1}{2} {(x^{2} + 5)}^{\frac{- 1}{2}} \frac{d}{d x} [x^{2} + 5])}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 9

Combine fractions.

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Step 9.1

Move the negative in front of the fraction.

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) + (4 - x^{2}) (\frac{1}{2} {(x^{2} + 5)}^{- \frac{1}{2}} \frac{d}{d x} [x^{2} + 5])}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 9.2

Combine $\frac{1}{2}$ and ${(x^{2} + 5)}^{- \frac{1}{2}}$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) + (4 - x^{2}) (\frac{{(x^{2} + 5)}^{- \frac{1}{2}}}{2} \frac{d}{d x} [x^{2} + 5])}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 9.3

Move ${(x^{2} + 5)}^{- \frac{1}{2}}$ to the denominator using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) + (4 - x^{2}) (\frac{1}{2 {(x^{2} + 5)}^{\frac{1}{2}}} \frac{d}{d x} [x^{2} + 5])}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 10

By the Sum Rule, the derivative of $x^{2} + 5$ with respect to $x$ is $\frac{d}{d x} [x^{2}] + \frac{d}{d x} [5]$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) + (4 - x^{2}) \frac{1}{2 {(x^{2} + 5)}^{\frac{1}{2}}} (\frac{d}{d x} [x^{2}] + \frac{d}{d x} [5])}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 11

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

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) + (4 - x^{2}) \frac{1}{2 {(x^{2} + 5)}^{\frac{1}{2}}} (2 x + \frac{d}{d x} [5])}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 12

Since $5$ is constant with respect to $x$ , the derivative of $5$ with respect to $x$ is $0$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) + (4 - x^{2}) \frac{1}{2 {(x^{2} + 5)}^{\frac{1}{2}}} (2 x + 0)}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 13

Simplify terms.

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Step 13.1

Add $2 x$ and $0$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) + (4 - x^{2}) \frac{1}{2 {(x^{2} + 5)}^{\frac{1}{2}}} (2 x)}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 13.2

Combine $2$ and $\frac{1}{2 {(x^{2} + 5)}^{\frac{1}{2}}}$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) + (4 - x^{2}) \frac{2}{2 {(x^{2} + 5)}^{\frac{1}{2}}} x}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 13.3

Combine $x$ and $\frac{2}{2 {(x^{2} + 5)}^{\frac{1}{2}}}$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) + (4 - x^{2}) \frac{x \cdot 2}{2 {(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 13.4

Move $2$ to the left of $x$ .

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) + (4 - x^{2}) \frac{2 \cdot x}{2 {(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 13.5

Cancel the common factor.

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) + (4 - x^{2}) \frac{2 x}{2 {(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 13.6

Rewrite the expression.

$\frac{(3 - {(x^{2} + 5)}^{\frac{1}{2}}) (- 2 x) + (4 - x^{2}) \frac{x}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14

Simplify.

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Step 14.1

Apply the distributive property.

$\frac{3 (- 2 x) - {(x^{2} + 5)}^{\frac{1}{2}} (- 2 x) + (4 - x^{2}) \frac{x}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2

Simplify the numerator.

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Step 14.2.1

Multiply $- 2$ by $3$ .

$\frac{- 6 x - {(x^{2} + 5)}^{\frac{1}{2}} (- 2 x) + (4 - x^{2}) \frac{x}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.2

Rewrite using the commutative property of multiplication.

$\frac{- 6 x - 1 \cdot - 2 {(x^{2} + 5)}^{\frac{1}{2}} x + (4 - x^{2}) \frac{x}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.3

Multiply $- 1$ by $- 2$ .

$\frac{- 6 x + 2 {(x^{2} + 5)}^{\frac{1}{2}} x + (4 - x^{2}) \frac{x}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.4

Multiply $4 - x^{2}$ by $\frac{x}{{(x^{2} + 5)}^{\frac{1}{2}}}$ .

$\frac{- 6 x + 2 {(x^{2} + 5)}^{\frac{1}{2}} x + \frac{(4 - x^{2}) x}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.5

Simplify the numerator.

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Step 14.2.5.1

Rewrite $4$ as $2^{2}$ .

$\frac{- 6 x + 2 {(x^{2} + 5)}^{\frac{1}{2}} x + \frac{(2^{2} - x^{2}) x}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.5.2

Since both terms are perfect squares, factor using the difference of squares formula, $a^{2} - b^{2} = (a + b) (a - b)$ where $a = 2$ and $b = x$ .

$\frac{- 6 x + 2 {(x^{2} + 5)}^{\frac{1}{2}} x + \frac{(2 + x) (2 - x) x}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.6

To write $- 6 x$ as a fraction with a common denominator, multiply by $\frac{{(x^{2} + 5)}^{\frac{1}{2}}}{{(x^{2} + 5)}^{\frac{1}{2}}}$ .

$\frac{2 {(x^{2} + 5)}^{\frac{1}{2}} x - 6 x \cdot \frac{{(x^{2} + 5)}^{\frac{1}{2}}}{{(x^{2} + 5)}^{\frac{1}{2}}} + \frac{(2 + x) (2 - x) x}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.7

Combine $- 6 x$ and $\frac{{(x^{2} + 5)}^{\frac{1}{2}}}{{(x^{2} + 5)}^{\frac{1}{2}}}$ .

$\frac{2 {(x^{2} + 5)}^{\frac{1}{2}} x + \frac{- 6 x {(x^{2} + 5)}^{\frac{1}{2}}}{{(x^{2} + 5)}^{\frac{1}{2}}} + \frac{(2 + x) (2 - x) x}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.8

Combine the numerators over the common denominator.

$\frac{2 {(x^{2} + 5)}^{\frac{1}{2}} x + \frac{- 6 x {(x^{2} + 5)}^{\frac{1}{2}} + (2 + x) (2 - x) x}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.9

Reorder $- 6 x {(x^{2} + 5)}^{\frac{1}{2}}$ and $x (x + 2) (- x + 2)$ .

$\frac{2 x {(x^{2} + 5)}^{\frac{1}{2}} + \frac{x (x + 2) (- x + 2) - 6 x {(x^{2} + 5)}^{\frac{1}{2}}}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.10

To write $2 x {(x^{2} + 5)}^{\frac{1}{2}}$ as a fraction with a common denominator, multiply by $\frac{{(x^{2} + 5)}^{\frac{1}{2}}}{{(x^{2} + 5)}^{\frac{1}{2}}}$ .

$\frac{\frac{2 x {(x^{2} + 5)}^{\frac{1}{2}} {(x^{2} + 5)}^{\frac{1}{2}}}{{(x^{2} + 5)}^{\frac{1}{2}}} + \frac{x (x + 2) (- x + 2) - 6 x {(x^{2} + 5)}^{\frac{1}{2}}}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.11

Combine the numerators over the common denominator.

$\frac{\frac{2 x {(x^{2} + 5)}^{\frac{1}{2}} {(x^{2} + 5)}^{\frac{1}{2}} + x (x + 2) (- x + 2) - 6 x {(x^{2} + 5)}^{\frac{1}{2}}}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.12

Reorder terms.

$\frac{\frac{2 x {(x^{2} + 5)}^{\frac{1}{2}} {(x^{2} + 5)}^{\frac{1}{2}} + x (- x + 2) (x + 2) - 6 x {(x^{2} + 5)}^{\frac{1}{2}}}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13

Rewrite $\frac{2 x {(x^{2} + 5)}^{\frac{1}{2}} {(x^{2} + 5)}^{\frac{1}{2}} + x (- x + 2) (x + 2) - 6 x {(x^{2} + 5)}^{\frac{1}{2}}}{{(x^{2} + 5)}^{\frac{1}{2}}}$ in a factored form.

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Step 14.2.13.1

Factor $x$ out of $2 x {(x^{2} + 5)}^{\frac{1}{2}} {(x^{2} + 5)}^{\frac{1}{2}} + x (- x + 2) (x + 2) - 6 x {(x^{2} + 5)}^{\frac{1}{2}}$ .

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Step 14.2.13.1.1

Factor $x$ out of $2 x {(x^{2} + 5)}^{\frac{1}{2}} {(x^{2} + 5)}^{\frac{1}{2}}$ .

$\frac{\frac{x (2 {(x^{2} + 5)}^{\frac{1}{2}} {(x^{2} + 5)}^{\frac{1}{2}}) + x (- x + 2) (x + 2) - 6 x {(x^{2} + 5)}^{\frac{1}{2}}}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13.1.2

Factor $x$ out of $x (- x + 2) (x + 2)$ .

$\frac{\frac{x (2 {(x^{2} + 5)}^{\frac{1}{2}} {(x^{2} + 5)}^{\frac{1}{2}}) + x ((- x + 2) (x + 2)) - 6 x {(x^{2} + 5)}^{\frac{1}{2}}}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13.1.3

Factor $x$ out of $- 6 x {(x^{2} + 5)}^{\frac{1}{2}}$ .

$\frac{\frac{x (2 {(x^{2} + 5)}^{\frac{1}{2}} {(x^{2} + 5)}^{\frac{1}{2}}) + x ((- x + 2) (x + 2)) + x (- 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13.1.4

Factor $x$ out of $x (2 {(x^{2} + 5)}^{\frac{1}{2}} {(x^{2} + 5)}^{\frac{1}{2}}) + x ((- x + 2) (x + 2))$ .

$\frac{\frac{x (2 {(x^{2} + 5)}^{\frac{1}{2}} {(x^{2} + 5)}^{\frac{1}{2}} + (- x + 2) (x + 2)) + x (- 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13.1.5

Factor $x$ out of $x (2 {(x^{2} + 5)}^{\frac{1}{2}} {(x^{2} + 5)}^{\frac{1}{2}} + (- x + 2) (x + 2)) + x (- 6 {(x^{2} + 5)}^{\frac{1}{2}})$ .

$\frac{\frac{x (2 {(x^{2} + 5)}^{\frac{1}{2}} {(x^{2} + 5)}^{\frac{1}{2}} + (- x + 2) (x + 2) - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13.2

Multiply ${(x^{2} + 5)}^{\frac{1}{2}}$ by ${(x^{2} + 5)}^{\frac{1}{2}}$ by adding the exponents.

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Step 14.2.13.2.1

Move ${(x^{2} + 5)}^{\frac{1}{2}}$ .

$\frac{\frac{x (2 ({(x^{2} + 5)}^{\frac{1}{2}} {(x^{2} + 5)}^{\frac{1}{2}}) + (- x + 2) (x + 2) - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13.2.2

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

$\frac{\frac{x (2 {(x^{2} + 5)}^{\frac{1}{2} + \frac{1}{2}} + (- x + 2) (x + 2) - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13.2.3

Combine the numerators over the common denominator.

$\frac{\frac{x (2 {(x^{2} + 5)}^{\frac{1 + 1}{2}} + (- x + 2) (x + 2) - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13.2.4

Add $1$ and $1$ .

$\frac{\frac{x (2 {(x^{2} + 5)}^{\frac{2}{2}} + (- x + 2) (x + 2) - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13.2.5

Divide $2$ by $2$ .

$\frac{\frac{x (2 {(x^{2} + 5)}^{1} + (- x + 2) (x + 2) - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13.3

Simplify $2 {(x^{2} + 5)}^{1}$ .

$\frac{\frac{x (2 (x^{2} + 5) + (- x + 2) (x + 2) - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13.4

Apply the distributive property.

$\frac{\frac{x (2 x^{2} + 2 \cdot 5 + (- x + 2) (x + 2) - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13.5

Multiply $2$ by $5$ .

$\frac{\frac{x (2 x^{2} + 10 + (- x + 2) (x + 2) - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13.6

Expand $(- x + 2) (x + 2)$ using the FOIL Method.

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Step 14.2.13.6.1

Apply the distributive property.

$\frac{\frac{x (2 x^{2} + 10 - x (x + 2) + 2 (x + 2) - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13.6.2

Apply the distributive property.

$\frac{\frac{x (2 x^{2} + 10 - x \cdot x - x \cdot 2 + 2 (x + 2) - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13.6.3

Apply the distributive property.

$\frac{\frac{x (2 x^{2} + 10 - x \cdot x - x \cdot 2 + 2 x + 2 \cdot 2 - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13.7

Simplify and combine like terms.

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Step 14.2.13.7.1

Simplify each term.

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Step 14.2.13.7.1.1

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

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Step 14.2.13.7.1.1.1

Move $x$ .

$\frac{\frac{x (2 x^{2} + 10 - (x \cdot x) - x \cdot 2 + 2 x + 2 \cdot 2 - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13.7.1.1.2

Multiply $x$ by $x$ .

$\frac{\frac{x (2 x^{2} + 10 - x^{2} - x \cdot 2 + 2 x + 2 \cdot 2 - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13.7.1.2

Multiply $2$ by $- 1$ .

$\frac{\frac{x (2 x^{2} + 10 - x^{2} - 2 x + 2 x + 2 \cdot 2 - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13.7.1.3

Multiply $2$ by $2$ .

$\frac{\frac{x (2 x^{2} + 10 - x^{2} - 2 x + 2 x + 4 - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13.7.2

Add $- 2 x$ and $2 x$ .

$\frac{\frac{x (2 x^{2} + 10 - x^{2} + 0 + 4 - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13.7.3

Add $- x^{2}$ and $0$ .

$\frac{\frac{x (2 x^{2} + 10 - x^{2} + 4 - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13.8

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

$\frac{\frac{x (x^{2} + 10 + 4 - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.2.13.9

Add $10$ and $4$ .

$\frac{\frac{x (x^{2} + 14 - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.3

Combine terms.

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Step 14.3.1

Rewrite $\frac{\frac{x (x^{2} + 14 - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$ as a product.

$\frac{x (x^{2} + 14 - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}} \cdot \frac{1}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$

Step 14.3.2

Multiply $\frac{x (x^{2} + 14 - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}}}$ by $\frac{1}{{(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$ .

$\frac{x (x^{2} + 14 - 6 {(x^{2} + 5)}^{\frac{1}{2}})}{{(x^{2} + 5)}^{\frac{1}{2}} {(3 - {(x^{2} + 5)}^{\frac{1}{2}})}^{2}}$