Calculus Examples

$f (x) = \ln (\frac{\sqrt{5 x^{2} - x}}{7 x + 4})$

Step 1

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

$\frac{d}{d x} [\ln (\frac{{(5 x^{2} - x)}^{\frac{1}{2}}}{7 x + 4})]$

Step 2

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = \ln (x)$ and $g (x) = \frac{{(5 x^{2} - x)}^{\frac{1}{2}}}{7 x + 4}$ .

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Step 2.1

To apply the Chain Rule, set $u_{1}$ as $\frac{{(5 x^{2} - x)}^{\frac{1}{2}}}{7 x + 4}$ .

$\frac{d}{d u_{1}} [\ln (u_{1})] \frac{d}{d x} [\frac{{(5 x^{2} - x)}^{\frac{1}{2}}}{7 x + 4}]$

Step 2.2

The derivative of $\ln (u_{1})$ with respect to $u_{1}$ is $\frac{1}{u_{1}}$ .

$\frac{1}{u_{1}} \frac{d}{d x} [\frac{{(5 x^{2} - x)}^{\frac{1}{2}}}{7 x + 4}]$

Step 2.3

Replace all occurrences of $u_{1}$ with $\frac{{(5 x^{2} - x)}^{\frac{1}{2}}}{7 x + 4}$ .

$\frac{1}{\frac{{(5 x^{2} - x)}^{\frac{1}{2}}}{7 x + 4}} \frac{d}{d x} [\frac{{(5 x^{2} - x)}^{\frac{1}{2}}}{7 x + 4}]$

Step 3

Multiply by the reciprocal of the fraction to divide by $\frac{{(5 x^{2} - x)}^{\frac{1}{2}}}{7 x + 4}$ .

$1 \frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \frac{d}{d x} [\frac{{(5 x^{2} - x)}^{\frac{1}{2}}}{7 x + 4}]$

Step 4

Multiply $\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}}$ by $1$ .

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \frac{d}{d x} [\frac{{(5 x^{2} - x)}^{\frac{1}{2}}}{7 x + 4}]$

Step 5

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 $f (x) = {(5 x^{2} - x)}^{\frac{1}{2}}$ and $g (x) = 7 x + 4$ .

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) \frac{d}{d x} [{(5 x^{2} - x)}^{\frac{1}{2}}] - {(5 x^{2} - x)}^{\frac{1}{2}} \frac{d}{d x} [7 x + 4]}{{(7 x + 4)}^{2}}$

Step 6

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 $g (x) = 5 x^{2} - x$ .

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Step 6.1

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

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) (\frac{d}{d u_{2}} [{u_{2}}^{\frac{1}{2}}] \frac{d}{d x} [5 x^{2} - x]) - {(5 x^{2} - x)}^{\frac{1}{2}} \frac{d}{d x} [7 x + 4]}{{(7 x + 4)}^{2}}$

Step 6.2

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

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) (\frac{1}{2} {u_{2}}^{\frac{1}{2} - 1} \frac{d}{d x} [5 x^{2} - x]) - {(5 x^{2} - x)}^{\frac{1}{2}} \frac{d}{d x} [7 x + 4]}{{(7 x + 4)}^{2}}$

Step 6.3

Replace all occurrences of $u_{2}$ with $5 x^{2} - x$ .

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) (\frac{1}{2} {(5 x^{2} - x)}^{\frac{1}{2} - 1} \frac{d}{d x} [5 x^{2} - x]) - {(5 x^{2} - x)}^{\frac{1}{2}} \frac{d}{d x} [7 x + 4]}{{(7 x + 4)}^{2}}$

Step 7

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

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) (\frac{1}{2} {(5 x^{2} - x)}^{\frac{1}{2} - 1 \cdot \frac{2}{2}} \frac{d}{d x} [5 x^{2} - x]) - {(5 x^{2} - x)}^{\frac{1}{2}} \frac{d}{d x} [7 x + 4]}{{(7 x + 4)}^{2}}$

Step 8

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

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) (\frac{1}{2} {(5 x^{2} - x)}^{\frac{1}{2} + \frac{- 1 \cdot 2}{2}} \frac{d}{d x} [5 x^{2} - x]) - {(5 x^{2} - x)}^{\frac{1}{2}} \frac{d}{d x} [7 x + 4]}{{(7 x + 4)}^{2}}$

Step 9

Combine the numerators over the common denominator.

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) (\frac{1}{2} {(5 x^{2} - x)}^{\frac{1 - 1 \cdot 2}{2}} \frac{d}{d x} [5 x^{2} - x]) - {(5 x^{2} - x)}^{\frac{1}{2}} \frac{d}{d x} [7 x + 4]}{{(7 x + 4)}^{2}}$

Step 10

Simplify the numerator.

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Step 10.1

Multiply $- 1$ by $2$ .

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) (\frac{1}{2} {(5 x^{2} - x)}^{\frac{1 - 2}{2}} \frac{d}{d x} [5 x^{2} - x]) - {(5 x^{2} - x)}^{\frac{1}{2}} \frac{d}{d x} [7 x + 4]}{{(7 x + 4)}^{2}}$

Step 10.2

Subtract $2$ from $1$ .

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) (\frac{1}{2} {(5 x^{2} - x)}^{\frac{- 1}{2}} \frac{d}{d x} [5 x^{2} - x]) - {(5 x^{2} - x)}^{\frac{1}{2}} \frac{d}{d x} [7 x + 4]}{{(7 x + 4)}^{2}}$

Step 11

Combine fractions.

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Step 11.1

Move the negative in front of the fraction.

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) (\frac{1}{2} {(5 x^{2} - x)}^{- \frac{1}{2}} \frac{d}{d x} [5 x^{2} - x]) - {(5 x^{2} - x)}^{\frac{1}{2}} \frac{d}{d x} [7 x + 4]}{{(7 x + 4)}^{2}}$

Step 11.2

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

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) (\frac{{(5 x^{2} - x)}^{- \frac{1}{2}}}{2} \frac{d}{d x} [5 x^{2} - x]) - {(5 x^{2} - x)}^{\frac{1}{2}} \frac{d}{d x} [7 x + 4]}{{(7 x + 4)}^{2}}$

Step 11.3

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

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) (\frac{1}{2 {(5 x^{2} - x)}^{\frac{1}{2}}} \frac{d}{d x} [5 x^{2} - x]) - {(5 x^{2} - x)}^{\frac{1}{2}} \frac{d}{d x} [7 x + 4]}{{(7 x + 4)}^{2}}$

Step 12

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

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) \frac{1}{2 {(5 x^{2} - x)}^{\frac{1}{2}}} (\frac{d}{d x} [5 x^{2}] + \frac{d}{d x} [- x]) - {(5 x^{2} - x)}^{\frac{1}{2}} \frac{d}{d x} [7 x + 4]}{{(7 x + 4)}^{2}}$

Step 13

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

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) \frac{1}{2 {(5 x^{2} - x)}^{\frac{1}{2}}} (5 \frac{d}{d x} [x^{2}] + \frac{d}{d x} [- x]) - {(5 x^{2} - x)}^{\frac{1}{2}} \frac{d}{d x} [7 x + 4]}{{(7 x + 4)}^{2}}$

Step 14

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

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) \frac{1}{2 {(5 x^{2} - x)}^{\frac{1}{2}}} (5 (2 x) + \frac{d}{d x} [- x]) - {(5 x^{2} - x)}^{\frac{1}{2}} \frac{d}{d x} [7 x + 4]}{{(7 x + 4)}^{2}}$

Step 15

Multiply $2$ by $5$ .

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) \frac{1}{2 {(5 x^{2} - x)}^{\frac{1}{2}}} (10 x + \frac{d}{d x} [- x]) - {(5 x^{2} - x)}^{\frac{1}{2}} \frac{d}{d x} [7 x + 4]}{{(7 x + 4)}^{2}}$

Step 16

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

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) \frac{1}{2 {(5 x^{2} - x)}^{\frac{1}{2}}} (10 x - \frac{d}{d x} [x]) - {(5 x^{2} - x)}^{\frac{1}{2}} \frac{d}{d x} [7 x + 4]}{{(7 x + 4)}^{2}}$

Step 17

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

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) \frac{1}{2 {(5 x^{2} - x)}^{\frac{1}{2}}} (10 x - 1 \cdot 1) - {(5 x^{2} - x)}^{\frac{1}{2}} \frac{d}{d x} [7 x + 4]}{{(7 x + 4)}^{2}}$

Step 18

Multiply $- 1$ by $1$ .

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) \frac{1}{2 {(5 x^{2} - x)}^{\frac{1}{2}}} (10 x - 1) - {(5 x^{2} - x)}^{\frac{1}{2}} \frac{d}{d x} [7 x + 4]}{{(7 x + 4)}^{2}}$

Step 19

By the Sum Rule, the derivative of $7 x + 4$ with respect to $x$ is $\frac{d}{d x} [7 x] + \frac{d}{d x} [4]$ .

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) \frac{1}{2 {(5 x^{2} - x)}^{\frac{1}{2}}} (10 x - 1) - {(5 x^{2} - x)}^{\frac{1}{2}} (\frac{d}{d x} [7 x] + \frac{d}{d x} [4])}{{(7 x + 4)}^{2}}$

Step 20

Since $7$ is constant with respect to $x$ , the derivative of $7 x$ with respect to $x$ is $7 \frac{d}{d x} [x]$ .

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) \frac{1}{2 {(5 x^{2} - x)}^{\frac{1}{2}}} (10 x - 1) - {(5 x^{2} - x)}^{\frac{1}{2}} (7 \frac{d}{d x} [x] + \frac{d}{d x} [4])}{{(7 x + 4)}^{2}}$

Step 21

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

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) \frac{1}{2 {(5 x^{2} - x)}^{\frac{1}{2}}} (10 x - 1) - {(5 x^{2} - x)}^{\frac{1}{2}} (7 \cdot 1 + \frac{d}{d x} [4])}{{(7 x + 4)}^{2}}$

Step 22

Multiply $7$ by $1$ .

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) \frac{1}{2 {(5 x^{2} - x)}^{\frac{1}{2}}} (10 x - 1) - {(5 x^{2} - x)}^{\frac{1}{2}} (7 + \frac{d}{d x} [4])}{{(7 x + 4)}^{2}}$

Step 23

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

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) \frac{1}{2 {(5 x^{2} - x)}^{\frac{1}{2}}} (10 x - 1) - {(5 x^{2} - x)}^{\frac{1}{2}} (7 + 0)}{{(7 x + 4)}^{2}}$

Step 24

Combine fractions.

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Step 24.1

Add $7$ and $0$ .

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) \frac{1}{2 {(5 x^{2} - x)}^{\frac{1}{2}}} (10 x - 1) - {(5 x^{2} - x)}^{\frac{1}{2}} \cdot 7}{{(7 x + 4)}^{2}}$

Step 24.2

Multiply $7$ by $- 1$ .

$\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{(7 x + 4) \frac{1}{2 {(5 x^{2} - x)}^{\frac{1}{2}}} (10 x - 1) - 7 {(5 x^{2} - x)}^{\frac{1}{2}}}{{(7 x + 4)}^{2}}$

Step 24.3

Multiply $\frac{7 x + 4}{{(5 x^{2} - x)}^{\frac{1}{2}}}$ by $\frac{(7 x + 4) \frac{1}{2 {(5 x^{2} - x)}^{\frac{1}{2}}} (10 x - 1) - 7 {(5 x^{2} - x)}^{\frac{1}{2}}}{{(7 x + 4)}^{2}}$ .

$\frac{(7 x + 4) ((7 x + 4) \frac{1}{2 {(5 x^{2} - x)}^{\frac{1}{2}}} (10 x - 1) - 7 {(5 x^{2} - x)}^{\frac{1}{2}})}{{(5 x^{2} - x)}^{\frac{1}{2}} {(7 x + 4)}^{2}}$

Step 25

Cancel the common factors.

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Step 25.1

Factor $7 x + 4$ out of ${(5 x^{2} - x)}^{\frac{1}{2}} {(7 x + 4)}^{2}$ .

$\frac{(7 x + 4) ((7 x + 4) \frac{1}{2 {(5 x^{2} - x)}^{\frac{1}{2}}} (10 x - 1) - 7 {(5 x^{2} - x)}^{\frac{1}{2}})}{(7 x + 4) ({(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4))}$

Step 25.2

Cancel the common factor.

$\frac{(7 x + 4) ((7 x + 4) \frac{1}{2 {(5 x^{2} - x)}^{\frac{1}{2}}} (10 x - 1) - 7 {(5 x^{2} - x)}^{\frac{1}{2}})}{(7 x + 4) ({(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4))}$

Step 25.3

Rewrite the expression.

$\frac{(7 x + 4) \frac{1}{2 {(5 x^{2} - x)}^{\frac{1}{2}}} (10 x - 1) - 7 {(5 x^{2} - x)}^{\frac{1}{2}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26

Simplify.

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Step 26.1

Simplify the numerator.

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Step 26.1.1

Add parentheses.

$\frac{(7 x + 4) (\frac{1}{2 {(5 x^{2} - x)}^{\frac{1}{2}}} (10 x - 1)) - 7 {(5 x^{2} - x)}^{\frac{1}{2}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.2

Let $u_{3} = {(5 x^{2} - x)}^{\frac{1}{2}}$ . Substitute $u_{3}$ for all occurrences of ${(5 x^{2} - x)}^{\frac{1}{2}}$ .

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Step 26.1.2.1

Expand $(7 x + 4) (10 x - 1)$ using the FOIL Method.

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Step 26.1.2.1.1

Apply the distributive property.

$\frac{\frac{7 x (10 x - 1) + 4 (10 x - 1) - 7 u_{3} (2 u_{3})}{2 u_{3}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.2.1.2

Apply the distributive property.

$\frac{\frac{7 x (10 x) + 7 x \cdot - 1 + 4 (10 x - 1) - 7 u_{3} (2 u_{3})}{2 u_{3}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.2.1.3

Apply the distributive property.

$\frac{\frac{7 x (10 x) + 7 x \cdot - 1 + 4 (10 x) + 4 \cdot - 1 - 7 u_{3} (2 u_{3})}{2 u_{3}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.2.2

Simplify and combine like terms.

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Step 26.1.2.2.1

Simplify each term.

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Step 26.1.2.2.1.1

Rewrite using the commutative property of multiplication.

$\frac{\frac{7 \cdot 10 x \cdot x + 7 x \cdot - 1 + 4 (10 x) + 4 \cdot - 1 - 7 u_{3} (2 u_{3})}{2 u_{3}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.2.2.1.2

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

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Step 26.1.2.2.1.2.1

Move $x$ .

$\frac{\frac{7 \cdot 10 (x \cdot x) + 7 x \cdot - 1 + 4 (10 x) + 4 \cdot - 1 - 7 u_{3} (2 u_{3})}{2 u_{3}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.2.2.1.2.2

Multiply $x$ by $x$ .

$\frac{\frac{7 \cdot 10 x^{2} + 7 x \cdot - 1 + 4 (10 x) + 4 \cdot - 1 - 7 u_{3} (2 u_{3})}{2 u_{3}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.2.2.1.3

Multiply $7$ by $10$ .

$\frac{\frac{70 x^{2} + 7 x \cdot - 1 + 4 (10 x) + 4 \cdot - 1 - 7 u_{3} (2 u_{3})}{2 u_{3}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.2.2.1.4

Multiply $- 1$ by $7$ .

$\frac{\frac{70 x^{2} - 7 x + 4 (10 x) + 4 \cdot - 1 - 7 u_{3} (2 u_{3})}{2 u_{3}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.2.2.1.5

Multiply $10$ by $4$ .

$\frac{\frac{70 x^{2} - 7 x + 40 x + 4 \cdot - 1 - 7 u_{3} (2 u_{3})}{2 u_{3}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.2.2.1.6

Multiply $4$ by $- 1$ .

$\frac{\frac{70 x^{2} - 7 x + 40 x - 4 - 7 u_{3} (2 u_{3})}{2 u_{3}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.2.2.2

Add $- 7 x$ and $40 x$ .

$\frac{\frac{70 x^{2} + 33 x - 4 - 7 u_{3} (2 u_{3})}{2 u_{3}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.2.3

Rewrite using the commutative property of multiplication.

$\frac{\frac{70 x^{2} + 33 x - 4 - 7 \cdot 2 u_{3} \cdot u_{3}}{2 u_{3}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.2.4

Multiply $u_{3}$ by $u_{3}$ by adding the exponents.

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Step 26.1.2.4.1

Move $u_{3}$ .

$\frac{\frac{70 x^{2} + 33 x - 4 - 7 \cdot 2 (u_{3} \cdot u_{3})}{2 u_{3}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.2.4.2

Multiply $u_{3}$ by $u_{3}$ .

$\frac{\frac{70 x^{2} + 33 x - 4 - 7 \cdot 2 {u_{3}}^{2}}{2 u_{3}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.2.5

Multiply $- 7$ by $2$ .

$\frac{\frac{70 x^{2} + 33 x - 4 - 14 {u_{3}}^{2}}{2 u_{3}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.3

Replace all occurrences of $u_{3}$ with ${(5 x^{2} - x)}^{\frac{1}{2}}$ .

$\frac{\frac{70 x^{2} + 33 x - 4 - 14 {({(5 x^{2} - x)}^{\frac{1}{2}})}^{2}}{2 {(5 x^{2} - x)}^{\frac{1}{2}}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.4

Simplify.

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Step 26.1.4.1

Simplify each term.

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Step 26.1.4.1.1

Multiply the exponents in ${({(5 x^{2} - x)}^{\frac{1}{2}})}^{2}$ .

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Step 26.1.4.1.1.1

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

$\frac{\frac{70 x^{2} + 33 x - 4 - 14 {(5 x^{2} - x)}^{\frac{1}{2} \cdot 2}}{2 {(5 x^{2} - x)}^{\frac{1}{2}}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.4.1.1.2

Cancel the common factor of $2$ .

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Step 26.1.4.1.1.2.1

Cancel the common factor.

$\frac{\frac{70 x^{2} + 33 x - 4 - 14 {(5 x^{2} - x)}^{\frac{1}{2} \cdot 2}}{2 {(5 x^{2} - x)}^{\frac{1}{2}}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.4.1.1.2.2

Rewrite the expression.

$\frac{\frac{70 x^{2} + 33 x - 4 - 14 {(5 x^{2} - x)}^{1}}{2 {(5 x^{2} - x)}^{\frac{1}{2}}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.4.1.2

Simplify.

$\frac{\frac{70 x^{2} + 33 x - 4 - 14 (5 x^{2} - x)}{2 {(5 x^{2} - x)}^{\frac{1}{2}}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.4.1.3

Apply the distributive property.

$\frac{\frac{70 x^{2} + 33 x - 4 - 14 (5 x^{2}) - 14 (- x)}{2 {(5 x^{2} - x)}^{\frac{1}{2}}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.4.1.4

Multiply $5$ by $- 14$ .

$\frac{\frac{70 x^{2} + 33 x - 4 - 70 x^{2} - 14 (- x)}{2 {(5 x^{2} - x)}^{\frac{1}{2}}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.4.1.5

Multiply $- 1$ by $- 14$ .

$\frac{\frac{70 x^{2} + 33 x - 4 - 70 x^{2} + 14 x}{2 {(5 x^{2} - x)}^{\frac{1}{2}}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.4.2

Combine the opposite terms in $70 x^{2} + 33 x - 4 - 70 x^{2} + 14 x$ .

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Step 26.1.4.2.1

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

$\frac{\frac{33 x - 4 + 0 + 14 x}{2 {(5 x^{2} - x)}^{\frac{1}{2}}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.4.2.2

Add $33 x - 4$ and $0$ .

$\frac{\frac{33 x - 4 + 14 x}{2 {(5 x^{2} - x)}^{\frac{1}{2}}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.1.4.3

Add $33 x$ and $14 x$ .

$\frac{\frac{47 x - 4}{2 {(5 x^{2} - x)}^{\frac{1}{2}}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.2

Combine terms.

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Step 26.2.1

Rewrite $\frac{\frac{47 x - 4}{2 {(5 x^{2} - x)}^{\frac{1}{2}}}}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$ as a product.

$\frac{47 x - 4}{2 {(5 x^{2} - x)}^{\frac{1}{2}}} \cdot \frac{1}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$

Step 26.2.2

Multiply $\frac{47 x - 4}{2 {(5 x^{2} - x)}^{\frac{1}{2}}}$ by $\frac{1}{{(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4)}$ .

$\frac{47 x - 4}{2 {(5 x^{2} - x)}^{\frac{1}{2}} ({(5 x^{2} - x)}^{\frac{1}{2}} (7 x + 4))}$

Step 26.2.3

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

$\frac{47 x - 4}{2 {(5 x^{2} - x)}^{\frac{1}{2} + \frac{1}{2}} (7 x + 4)}$

Step 26.2.4

Combine the numerators over the common denominator.

$\frac{47 x - 4}{2 {(5 x^{2} - x)}^{\frac{1 + 1}{2}} (7 x + 4)}$

Step 26.2.5

Add $1$ and $1$ .

$\frac{47 x - 4}{2 {(5 x^{2} - x)}^{\frac{2}{2}} (7 x + 4)}$

Step 26.2.6

Cancel the common factor of $2$ .

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Step 26.2.6.1

Cancel the common factor.

$\frac{47 x - 4}{2 {(5 x^{2} - x)}^{\frac{2}{2}} (7 x + 4)}$

Step 26.2.6.2

Rewrite the expression.

$\frac{47 x - 4}{2 {(5 x^{2} - x)}^{1} (7 x + 4)}$

Step 26.2.7

Simplify.

$\frac{47 x - 4}{2 (5 x^{2} - x) (7 x + 4)}$

Step 26.3

Factor $x$ out of $5 x^{2} - x$ .

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Step 26.3.1

Factor $x$ out of $5 x^{2}$ .

$\frac{47 x - 4}{2 (x (5 x) - x) (7 x + 4)}$

Step 26.3.2

Factor $x$ out of $- x$ .

$\frac{47 x - 4}{2 (x (5 x) + x \cdot - 1) (7 x + 4)}$

Step 26.3.3

Factor $x$ out of $x (5 x) + x \cdot - 1$ .

$\frac{47 x - 4}{2 (x (5 x - 1)) (7 x + 4)}$

$\frac{47 x - 4}{2 x (5 x - 1) (7 x + 4)}$