Finite Math Examples

$f (x) = \frac{\sqrt[3]{2 x - 5}}{8} + 4$

Step 1

Write $f (x) = \frac{\sqrt[3]{2 x - 5}}{8} + 4$ as an equation.

$y = \frac{\sqrt[3]{2 x - 5}}{8} + 4$

Step 2

Interchange the variables.

$x = \frac{\sqrt[3]{2 y - 5}}{8} + 4$

Step 3

Solve for $y$ .

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Step 3.1

Rewrite the equation as $\frac{\sqrt[3]{2 y - 5}}{8} + 4 = x$ .

$\frac{\sqrt[3]{2 y - 5}}{8} + 4 = x$

Step 3.2

Solve for $\sqrt[3]{2 y - 5}$ .

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Step 3.2.1

Subtract $4$ from both sides of the equation.

$\frac{\sqrt[3]{2 y - 5}}{8} = x - 4$

Step 3.2.2

Multiply both sides of the equation by $8$ .

$8 \frac{\sqrt[3]{2 y - 5}}{8} = 8 (x - 4)$

Step 3.2.3

Simplify both sides of the equation.

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Step 3.2.3.1

Simplify the left side.

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Step 3.2.3.1.1

Cancel the common factor of $8$ .

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Step 3.2.3.1.1.1

Cancel the common factor.

$8 \frac{\sqrt[3]{2 y - 5}}{8} = 8 (x - 4)$

Step 3.2.3.1.1.2

Rewrite the expression.

$\sqrt[3]{2 y - 5} = 8 (x - 4)$

Step 3.2.3.2

Simplify the right side.

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Step 3.2.3.2.1

Simplify $8 (x - 4)$ .

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Step 3.2.3.2.1.1

Apply the distributive property.

$\sqrt[3]{2 y - 5} = 8 x + 8 \cdot - 4$

Step 3.2.3.2.1.2

Multiply $8$ by $- 4$ .

$\sqrt[3]{2 y - 5} = 8 x - 32$

Step 3.3

To remove the radical on the left side of the equation, cube both sides of the equation.

${\sqrt[3]{2 y - 5}}^{3} = {(8 x - 32)}^{3}$

Step 3.4

Simplify each side of the equation.

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Step 3.4.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt[3]{2 y - 5}$ as ${(2 y - 5)}^{\frac{1}{3}}$ .

${({(2 y - 5)}^{\frac{1}{3}})}^{3} = {(8 x - 32)}^{3}$

Step 3.4.2

Simplify the left side.

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Step 3.4.2.1

Simplify ${({(2 y - 5)}^{\frac{1}{3}})}^{3}$ .

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Step 3.4.2.1.1

Multiply the exponents in ${({(2 y - 5)}^{\frac{1}{3}})}^{3}$ .

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Step 3.4.2.1.1.1

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

${(2 y - 5)}^{\frac{1}{3} \cdot 3} = {(8 x - 32)}^{3}$

Step 3.4.2.1.1.2

Cancel the common factor of $3$ .

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Step 3.4.2.1.1.2.1

Cancel the common factor.

${(2 y - 5)}^{\frac{1}{3} \cdot 3} = {(8 x - 32)}^{3}$

Step 3.4.2.1.1.2.2

Rewrite the expression.

${(2 y - 5)}^{1} = {(8 x - 32)}^{3}$

Step 3.4.2.1.2

Simplify.

$2 y - 5 = {(8 x - 32)}^{3}$

Step 3.4.3

Simplify the right side.

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Step 3.4.3.1

Simplify ${(8 x - 32)}^{3}$ .

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Step 3.4.3.1.1

Use the Binomial Theorem.

$2 y - 5 = {(8 x)}^{3} + 3 {(8 x)}^{2} \cdot - 32 + 3 (8 x) {(- 32)}^{2} + {(- 32)}^{3}$

Step 3.4.3.1.2

Simplify each term.

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Step 3.4.3.1.2.1

Apply the product rule to $8 x$ .

$2 y - 5 = 8^{3} x^{3} + 3 {(8 x)}^{2} \cdot - 32 + 3 (8 x) {(- 32)}^{2} + {(- 32)}^{3}$

Step 3.4.3.1.2.2

Raise $8$ to the power of $3$ .

$2 y - 5 = 512 x^{3} + 3 {(8 x)}^{2} \cdot - 32 + 3 (8 x) {(- 32)}^{2} + {(- 32)}^{3}$

Step 3.4.3.1.2.3

Apply the product rule to $8 x$ .

$2 y - 5 = 512 x^{3} + 3 (8^{2} x^{2}) \cdot - 32 + 3 (8 x) {(- 32)}^{2} + {(- 32)}^{3}$

Step 3.4.3.1.2.4

Raise $8$ to the power of $2$ .

$2 y - 5 = 512 x^{3} + 3 (64 x^{2}) \cdot - 32 + 3 (8 x) {(- 32)}^{2} + {(- 32)}^{3}$

Step 3.4.3.1.2.5

Multiply $64$ by $3$ .

$2 y - 5 = 512 x^{3} + 192 x^{2} \cdot - 32 + 3 (8 x) {(- 32)}^{2} + {(- 32)}^{3}$

Step 3.4.3.1.2.6

Multiply $- 32$ by $192$ .

$2 y - 5 = 512 x^{3} - 6144 x^{2} + 3 (8 x) {(- 32)}^{2} + {(- 32)}^{3}$

Step 3.4.3.1.2.7

Multiply $8$ by $3$ .

$2 y - 5 = 512 x^{3} - 6144 x^{2} + 24 x {(- 32)}^{2} + {(- 32)}^{3}$

Step 3.4.3.1.2.8

Raise $- 32$ to the power of $2$ .

$2 y - 5 = 512 x^{3} - 6144 x^{2} + 24 x \cdot 1024 + {(- 32)}^{3}$

Step 3.4.3.1.2.9

Multiply $1024$ by $24$ .

$2 y - 5 = 512 x^{3} - 6144 x^{2} + 24576 x + {(- 32)}^{3}$

Step 3.4.3.1.2.10

Raise $- 32$ to the power of $3$ .

$2 y - 5 = 512 x^{3} - 6144 x^{2} + 24576 x - 32768$

Step 3.5

Solve for $y$ .

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Step 3.5.1

Move all terms not containing $y$ to the right side of the equation.

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Step 3.5.1.1

Add $5$ to both sides of the equation.

$2 y = 512 x^{3} - 6144 x^{2} + 24576 x - 32768 + 5$

Step 3.5.1.2

Add $- 32768$ and $5$ .

$2 y = 512 x^{3} - 6144 x^{2} + 24576 x - 32763$

Step 3.5.2

Divide each term in $2 y = 512 x^{3} - 6144 x^{2} + 24576 x - 32763$ by $2$ and simplify.

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Step 3.5.2.1

Divide each term in $2 y = 512 x^{3} - 6144 x^{2} + 24576 x - 32763$ by $2$ .

$\frac{2 y}{2} = \frac{512 x^{3}}{2} + \frac{- 6144 x^{2}}{2} + \frac{24576 x}{2} + \frac{- 32763}{2}$

Step 3.5.2.2

Simplify the left side.

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Step 3.5.2.2.1

Cancel the common factor of $2$ .

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Step 3.5.2.2.1.1

Cancel the common factor.

$\frac{2 y}{2} = \frac{512 x^{3}}{2} + \frac{- 6144 x^{2}}{2} + \frac{24576 x}{2} + \frac{- 32763}{2}$

Step 3.5.2.2.1.2

Divide $y$ by $1$ .

$y = \frac{512 x^{3}}{2} + \frac{- 6144 x^{2}}{2} + \frac{24576 x}{2} + \frac{- 32763}{2}$

Step 3.5.2.3

Simplify the right side.

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Step 3.5.2.3.1

Simplify each term.

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Step 3.5.2.3.1.1

Cancel the common factor of $512$ and $2$ .

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Step 3.5.2.3.1.1.1

Factor $2$ out of $512 x^{3}$ .

$y = \frac{2 (256 x^{3})}{2} + \frac{- 6144 x^{2}}{2} + \frac{24576 x}{2} + \frac{- 32763}{2}$

Step 3.5.2.3.1.1.2

Cancel the common factors.

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Step 3.5.2.3.1.1.2.1

Factor $2$ out of $2$ .

$y = \frac{2 (256 x^{3})}{2 (1)} + \frac{- 6144 x^{2}}{2} + \frac{24576 x}{2} + \frac{- 32763}{2}$

Step 3.5.2.3.1.1.2.2

Cancel the common factor.

$y = \frac{2 (256 x^{3})}{2 \cdot 1} + \frac{- 6144 x^{2}}{2} + \frac{24576 x}{2} + \frac{- 32763}{2}$

Step 3.5.2.3.1.1.2.3

Rewrite the expression.

$y = \frac{256 x^{3}}{1} + \frac{- 6144 x^{2}}{2} + \frac{24576 x}{2} + \frac{- 32763}{2}$

Step 3.5.2.3.1.1.2.4

Divide $256 x^{3}$ by $1$ .

$y = 256 x^{3} + \frac{- 6144 x^{2}}{2} + \frac{24576 x}{2} + \frac{- 32763}{2}$

Step 3.5.2.3.1.2

Cancel the common factor of $- 6144$ and $2$ .

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Step 3.5.2.3.1.2.1

Factor $2$ out of $- 6144 x^{2}$ .

$y = 256 x^{3} + \frac{2 (- 3072 x^{2})}{2} + \frac{24576 x}{2} + \frac{- 32763}{2}$

Step 3.5.2.3.1.2.2

Cancel the common factors.

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Step 3.5.2.3.1.2.2.1

Factor $2$ out of $2$ .

$y = 256 x^{3} + \frac{2 (- 3072 x^{2})}{2 (1)} + \frac{24576 x}{2} + \frac{- 32763}{2}$

Step 3.5.2.3.1.2.2.2

Cancel the common factor.

$y = 256 x^{3} + \frac{2 (- 3072 x^{2})}{2 \cdot 1} + \frac{24576 x}{2} + \frac{- 32763}{2}$

Step 3.5.2.3.1.2.2.3

Rewrite the expression.

$y = 256 x^{3} + \frac{- 3072 x^{2}}{1} + \frac{24576 x}{2} + \frac{- 32763}{2}$

Step 3.5.2.3.1.2.2.4

Divide $- 3072 x^{2}$ by $1$ .

$y = 256 x^{3} - 3072 x^{2} + \frac{24576 x}{2} + \frac{- 32763}{2}$

Step 3.5.2.3.1.3

Cancel the common factor of $24576$ and $2$ .

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Step 3.5.2.3.1.3.1

Factor $2$ out of $24576 x$ .

$y = 256 x^{3} - 3072 x^{2} + \frac{2 (12288 x)}{2} + \frac{- 32763}{2}$

Step 3.5.2.3.1.3.2

Cancel the common factors.

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Step 3.5.2.3.1.3.2.1

Factor $2$ out of $2$ .

$y = 256 x^{3} - 3072 x^{2} + \frac{2 (12288 x)}{2 (1)} + \frac{- 32763}{2}$

Step 3.5.2.3.1.3.2.2

Cancel the common factor.

$y = 256 x^{3} - 3072 x^{2} + \frac{2 (12288 x)}{2 \cdot 1} + \frac{- 32763}{2}$

Step 3.5.2.3.1.3.2.3

Rewrite the expression.

$y = 256 x^{3} - 3072 x^{2} + \frac{12288 x}{1} + \frac{- 32763}{2}$

Step 3.5.2.3.1.3.2.4

Divide $12288 x$ by $1$ .

$y = 256 x^{3} - 3072 x^{2} + 12288 x + \frac{- 32763}{2}$

Step 3.5.2.3.1.4

Move the negative in front of the fraction.

$y = 256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}$

Step 4

Replace $y$ with $f^{- 1} (x)$ to show the final answer.

$f^{- 1} (x) = 256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}$

Step 5

Verify if $f^{- 1} (x) = 256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}$ is the inverse of $f (x) = \frac{\sqrt[3]{2 x - 5}}{8} + 4$ .

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Step 5.1

To verify the inverse, check if $f^{- 1} (f (x)) = x$ and $f (f^{- 1} (x)) = x$ .

Step 5.2

Evaluate $f^{- 1} (f (x))$ .

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Step 5.2.1

Set up the composite result function.

$f^{- 1} (f (x))$

Step 5.2.2

Evaluate $f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4)$ by substituting in the value of $f$ into $f^{- 1}$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = 256 {(\frac{\sqrt[3]{2 x - 5}}{8} + 4)}^{3} - 3072 {(\frac{\sqrt[3]{2 x - 5}}{8} + 4)}^{2} + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3

Simplify each term.

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Step 5.2.3.1

To write $4$ as a fraction with a common denominator, multiply by $\frac{8}{8}$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = 256 {(\frac{\sqrt[3]{2 x - 5}}{8} + 4 \cdot \frac{8}{8})}^{3} - 3072 {(\frac{\sqrt[3]{2 x - 5}}{8} + 4)}^{2} + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.2

Combine $4$ and $\frac{8}{8}$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = 256 {(\frac{\sqrt[3]{2 x - 5}}{8} + \frac{4 \cdot 8}{8})}^{3} - 3072 {(\frac{\sqrt[3]{2 x - 5}}{8} + 4)}^{2} + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.3

Combine the numerators over the common denominator.

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = 256 {(\frac{\sqrt[3]{2 x - 5} + 4 \cdot 8}{8})}^{3} - 3072 {(\frac{\sqrt[3]{2 x - 5}}{8} + 4)}^{2} + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.4

Multiply $4$ by $8$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = 256 {(\frac{\sqrt[3]{2 x - 5} + 32}{8})}^{3} - 3072 {(\frac{\sqrt[3]{2 x - 5}}{8} + 4)}^{2} + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.5

Apply the product rule to $\frac{\sqrt[3]{2 x - 5} + 32}{8}$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = 256 (\frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{8^{3}}) - 3072 {(\frac{\sqrt[3]{2 x - 5}}{8} + 4)}^{2} + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.6

Raise $8$ to the power of $3$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = 256 (\frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{512}) - 3072 {(\frac{\sqrt[3]{2 x - 5}}{8} + 4)}^{2} + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.7

Cancel the common factor of $256$ .

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Step 5.2.3.7.1

Factor $256$ out of $512$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = 256 (\frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{256 (2)}) - 3072 {(\frac{\sqrt[3]{2 x - 5}}{8} + 4)}^{2} + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.7.2

Cancel the common factor.

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = 256 (\frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{256 \cdot 2}) - 3072 {(\frac{\sqrt[3]{2 x - 5}}{8} + 4)}^{2} + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.7.3

Rewrite the expression.

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 3072 {(\frac{\sqrt[3]{2 x - 5}}{8} + 4)}^{2} + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.8

To write $4$ as a fraction with a common denominator, multiply by $\frac{8}{8}$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 3072 {(\frac{\sqrt[3]{2 x - 5}}{8} + 4 \cdot \frac{8}{8})}^{2} + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.9

Combine $4$ and $\frac{8}{8}$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 3072 {(\frac{\sqrt[3]{2 x - 5}}{8} + \frac{4 \cdot 8}{8})}^{2} + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.10

Combine the numerators over the common denominator.

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 3072 {(\frac{\sqrt[3]{2 x - 5} + 4 \cdot 8}{8})}^{2} + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.11

Multiply $4$ by $8$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 3072 {(\frac{\sqrt[3]{2 x - 5} + 32}{8})}^{2} + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.12

Apply the product rule to $\frac{\sqrt[3]{2 x - 5} + 32}{8}$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 3072 \frac{{(\sqrt[3]{2 x - 5} + 32)}^{2}}{8^{2}} + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.13

Raise $8$ to the power of $2$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 3072 \frac{{(\sqrt[3]{2 x - 5} + 32)}^{2}}{64} + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.14

Cancel the common factor of $64$ .

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Step 5.2.3.14.1

Factor $64$ out of $- 3072$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} + 64 (- 48) (\frac{{(\sqrt[3]{2 x - 5} + 32)}^{2}}{64}) + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.14.2

Cancel the common factor.

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} + 64 \cdot (- 48 \frac{{(\sqrt[3]{2 x - 5} + 32)}^{2}}{64}) + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.14.3

Rewrite the expression.

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 {(\sqrt[3]{2 x - 5} + 32)}^{2} + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.15

Rewrite ${(\sqrt[3]{2 x - 5} + 32)}^{2}$ as $(\sqrt[3]{2 x - 5} + 32) (\sqrt[3]{2 x - 5} + 32)$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 ((\sqrt[3]{2 x - 5} + 32) (\sqrt[3]{2 x - 5} + 32)) + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.16

Expand $(\sqrt[3]{2 x - 5} + 32) (\sqrt[3]{2 x - 5} + 32)$ using the FOIL Method.

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Step 5.2.3.16.1

Apply the distributive property.

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 (\sqrt[3]{2 x - 5} (\sqrt[3]{2 x - 5} + 32) + 32 (\sqrt[3]{2 x - 5} + 32)) + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.16.2

Apply the distributive property.

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 (\sqrt[3]{2 x - 5} \sqrt[3]{2 x - 5} + \sqrt[3]{2 x - 5} \cdot 32 + 32 (\sqrt[3]{2 x - 5} + 32)) + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.16.3

Apply the distributive property.

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 (\sqrt[3]{2 x - 5} \sqrt[3]{2 x - 5} + \sqrt[3]{2 x - 5} \cdot 32 + 32 \sqrt[3]{2 x - 5} + 32 \cdot 32) + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.17

Simplify and combine like terms.

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Step 5.2.3.17.1

Simplify each term.

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Step 5.2.3.17.1.1

Multiply $\sqrt[3]{2 x - 5} \sqrt[3]{2 x - 5}$ .

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Step 5.2.3.17.1.1.1

Raise $\sqrt[3]{2 x - 5}$ to the power of $1$ .

Step 5.2.3.17.1.1.2

Raise $\sqrt[3]{2 x - 5}$ to the power of $1$ .

Step 5.2.3.17.1.1.3

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

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 ({\sqrt[3]{2 x - 5}}^{1 + 1} + \sqrt[3]{2 x - 5} \cdot 32 + 32 \sqrt[3]{2 x - 5} + 32 \cdot 32) + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.17.1.1.4

Add $1$ and $1$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 ({\sqrt[3]{2 x - 5}}^{2} + \sqrt[3]{2 x - 5} \cdot 32 + 32 \sqrt[3]{2 x - 5} + 32 \cdot 32) + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.17.1.2

Rewrite ${\sqrt[3]{2 x - 5}}^{2}$ as $\sqrt[3]{{(2 x - 5)}^{2}}$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 (\sqrt[3]{{(2 x - 5)}^{2}} + \sqrt[3]{2 x - 5} \cdot 32 + 32 \sqrt[3]{2 x - 5} + 32 \cdot 32) + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.17.1.3

Move $32$ to the left of $\sqrt[3]{2 x - 5}$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 (\sqrt[3]{{(2 x - 5)}^{2}} + 32 \cdot \sqrt[3]{2 x - 5} + 32 \sqrt[3]{2 x - 5} + 32 \cdot 32) + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.17.1.4

Multiply $32$ by $32$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 (\sqrt[3]{{(2 x - 5)}^{2}} + 32 \sqrt[3]{2 x - 5} + 32 \sqrt[3]{2 x - 5} + 1024) + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.17.2

Add $32 \sqrt[3]{2 x - 5}$ and $32 \sqrt[3]{2 x - 5}$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 (\sqrt[3]{{(2 x - 5)}^{2}} + 64 \sqrt[3]{2 x - 5} + 1024) + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.18

Apply the distributive property.

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 \sqrt[3]{{(2 x - 5)}^{2}} - 48 (64 \sqrt[3]{2 x - 5}) - 48 \cdot 1024 + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.19

Simplify.

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Step 5.2.3.19.1

Multiply $64$ by $- 48$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 \sqrt[3]{{(2 x - 5)}^{2}} - 3072 \sqrt[3]{2 x - 5} - 48 \cdot 1024 + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.19.2

Multiply $- 48$ by $1024$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 \sqrt[3]{{(2 x - 5)}^{2}} - 3072 \sqrt[3]{2 x - 5} - 49152 + 12288 (\frac{\sqrt[3]{2 x - 5}}{8} + 4) - \frac{32763}{2}$

Step 5.2.3.20

To write $4$ as a fraction with a common denominator, multiply by $\frac{8}{8}$ .

Step 5.2.3.21

Combine $4$ and $\frac{8}{8}$ .

Step 5.2.3.22

Combine the numerators over the common denominator.

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 \sqrt[3]{{(2 x - 5)}^{2}} - 3072 \sqrt[3]{2 x - 5} - 49152 + 12288 (\frac{\sqrt[3]{2 x - 5} + 4 \cdot 8}{8}) - \frac{32763}{2}$

Step 5.2.3.23

Multiply $4$ by $8$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 \sqrt[3]{{(2 x - 5)}^{2}} - 3072 \sqrt[3]{2 x - 5} - 49152 + 12288 (\frac{\sqrt[3]{2 x - 5} + 32}{8}) - \frac{32763}{2}$

Step 5.2.3.24

Cancel the common factor of $8$ .

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Step 5.2.3.24.1

Factor $8$ out of $12288$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 \sqrt[3]{{(2 x - 5)}^{2}} - 3072 \sqrt[3]{2 x - 5} - 49152 + 8 (1536) (\frac{\sqrt[3]{2 x - 5} + 32}{8}) - \frac{32763}{2}$

Step 5.2.3.24.2

Cancel the common factor.

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 \sqrt[3]{{(2 x - 5)}^{2}} - 3072 \sqrt[3]{2 x - 5} - 49152 + 8 \cdot (1536 (\frac{\sqrt[3]{2 x - 5} + 32}{8})) - \frac{32763}{2}$

Step 5.2.3.24.3

Rewrite the expression.

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 \sqrt[3]{{(2 x - 5)}^{2}} - 3072 \sqrt[3]{2 x - 5} - 49152 + 1536 (\sqrt[3]{2 x - 5} + 32) - \frac{32763}{2}$

Step 5.2.3.25

Apply the distributive property.

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 \sqrt[3]{{(2 x - 5)}^{2}} - 3072 \sqrt[3]{2 x - 5} - 49152 + 1536 \sqrt[3]{2 x - 5} + 1536 \cdot 32 - \frac{32763}{2}$

Step 5.2.3.26

Multiply $1536$ by $32$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 \sqrt[3]{{(2 x - 5)}^{2}} - 3072 \sqrt[3]{2 x - 5} - 49152 + 1536 \sqrt[3]{2 x - 5} + 49152 - \frac{32763}{2}$

Step 5.2.4

Combine the opposite terms in $\frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 \sqrt[3]{{(2 x - 5)}^{2}} - 3072 \sqrt[3]{2 x - 5} - 49152 + 1536 \sqrt[3]{2 x - 5} + 49152 - \frac{32763}{2}$ .

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Step 5.2.4.1

Add $- 49152$ and $49152$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 \sqrt[3]{{(2 x - 5)}^{2}} - 3072 \sqrt[3]{2 x - 5} + 0 + 1536 \sqrt[3]{2 x - 5} - \frac{32763}{2}$

Step 5.2.4.2

Add $\frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 \sqrt[3]{{(2 x - 5)}^{2}} - 3072 \sqrt[3]{2 x - 5}$ and $0$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 \sqrt[3]{{(2 x - 5)}^{2}} - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} - \frac{32763}{2}$

Step 5.2.5

To write $- 48 \sqrt[3]{{(2 x - 5)}^{2}}$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} - 48 \sqrt[3]{{(2 x - 5)}^{2}} \cdot \frac{2}{2} - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} - \frac{32763}{2}$

Step 5.2.6

Simplify terms.

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Step 5.2.6.1

Combine $- 48 \sqrt[3]{{(2 x - 5)}^{2}}$ and $\frac{2}{2}$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3}}{2} + \frac{- 48 \sqrt[3]{{(2 x - 5)}^{2}} \cdot 2}{2} - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} - \frac{32763}{2}$

Step 5.2.6.2

Combine the numerators over the common denominator.

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(\sqrt[3]{2 x - 5} + 32)}^{3} - 48 \sqrt[3]{{(2 x - 5)}^{2}} \cdot 2}{2} - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} - \frac{32763}{2}$

Step 5.2.7

Simplify the numerator.

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Step 5.2.7.1

Use the Binomial Theorem.

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{\sqrt[3]{2 x - 5}}^{3} + 3 {\sqrt[3]{2 x - 5}}^{2} \cdot 32 + 3 \sqrt[3]{2 x - 5} \cdot 32^{2} + 32^{3} - 48 \sqrt[3]{{(2 x - 5)}^{2}} \cdot 2}{2} - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} - \frac{32763}{2}$

Step 5.2.7.2

Simplify each term.

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Step 5.2.7.2.1

Rewrite ${\sqrt[3]{2 x - 5}}^{3}$ as $2 x - 5$ .

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Step 5.2.7.2.1.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt[3]{2 x - 5}$ as ${(2 x - 5)}^{\frac{1}{3}}$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{({(2 x - 5)}^{\frac{1}{3}})}^{3} + 3 {\sqrt[3]{2 x - 5}}^{2} \cdot 32 + 3 \sqrt[3]{2 x - 5} \cdot 32^{2} + 32^{3} - 48 \sqrt[3]{{(2 x - 5)}^{2}} \cdot 2}{2} - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} - \frac{32763}{2}$

Step 5.2.7.2.1.2

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

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(2 x - 5)}^{\frac{1}{3} \cdot 3} + 3 {\sqrt[3]{2 x - 5}}^{2} \cdot 32 + 3 \sqrt[3]{2 x - 5} \cdot 32^{2} + 32^{3} - 48 \sqrt[3]{{(2 x - 5)}^{2}} \cdot 2}{2} - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} - \frac{32763}{2}$

Step 5.2.7.2.1.3

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

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{{(2 x - 5)}^{\frac{3}{3}} + 3 {\sqrt[3]{2 x - 5}}^{2} \cdot 32 + 3 \sqrt[3]{2 x - 5} \cdot 32^{2} + 32^{3} - 48 \sqrt[3]{{(2 x - 5)}^{2}} \cdot 2}{2} - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} - \frac{32763}{2}$

Step 5.2.7.2.1.4

Cancel the common factor of $3$ .

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Step 5.2.7.2.1.4.1

Cancel the common factor.

Step 5.2.7.2.1.4.2

Rewrite the expression.

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{(2 x - 5) + 3 {\sqrt[3]{2 x - 5}}^{2} \cdot 32 + 3 \sqrt[3]{2 x - 5} \cdot 32^{2} + 32^{3} - 48 \sqrt[3]{{(2 x - 5)}^{2}} \cdot 2}{2} - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} - \frac{32763}{2}$

Step 5.2.7.2.1.5

Simplify.

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{2 x - 5 + 3 {\sqrt[3]{2 x - 5}}^{2} \cdot 32 + 3 \sqrt[3]{2 x - 5} \cdot 32^{2} + 32^{3} - 48 \sqrt[3]{{(2 x - 5)}^{2}} \cdot 2}{2} - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} - \frac{32763}{2}$

Step 5.2.7.2.2

Rewrite ${\sqrt[3]{2 x - 5}}^{2}$ as $\sqrt[3]{{(2 x - 5)}^{2}}$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{2 x - 5 + 3 \sqrt[3]{{(2 x - 5)}^{2}} \cdot 32 + 3 \sqrt[3]{2 x - 5} \cdot 32^{2} + 32^{3} - 48 \sqrt[3]{{(2 x - 5)}^{2}} \cdot 2}{2} - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} - \frac{32763}{2}$

Step 5.2.7.2.3

Multiply $32$ by $3$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{2 x - 5 + 96 \sqrt[3]{{(2 x - 5)}^{2}} + 3 \sqrt[3]{2 x - 5} \cdot 32^{2} + 32^{3} - 48 \sqrt[3]{{(2 x - 5)}^{2}} \cdot 2}{2} - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} - \frac{32763}{2}$

Step 5.2.7.2.4

Raise $32$ to the power of $2$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{2 x - 5 + 96 \sqrt[3]{{(2 x - 5)}^{2}} + 3 \sqrt[3]{2 x - 5} \cdot 1024 + 32^{3} - 48 \sqrt[3]{{(2 x - 5)}^{2}} \cdot 2}{2} - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} - \frac{32763}{2}$

Step 5.2.7.2.5

Multiply $1024$ by $3$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{2 x - 5 + 96 \sqrt[3]{{(2 x - 5)}^{2}} + 3072 \sqrt[3]{2 x - 5} + 32^{3} - 48 \sqrt[3]{{(2 x - 5)}^{2}} \cdot 2}{2} - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} - \frac{32763}{2}$

Step 5.2.7.2.6

Raise $32$ to the power of $3$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{2 x - 5 + 96 \sqrt[3]{{(2 x - 5)}^{2}} + 3072 \sqrt[3]{2 x - 5} + 32768 - 48 \sqrt[3]{{(2 x - 5)}^{2}} \cdot 2}{2} - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} - \frac{32763}{2}$

Step 5.2.7.3

Add $- 5$ and $32768$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{2 x + 32763 + 96 \sqrt[3]{{(2 x - 5)}^{2}} + 3072 \sqrt[3]{2 x - 5} - 48 \sqrt[3]{{(2 x - 5)}^{2}} \cdot 2}{2} - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} - \frac{32763}{2}$

Step 5.2.7.4

Multiply $2$ by $- 48$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{2 x + 32763 + 96 \sqrt[3]{{(2 x - 5)}^{2}} + 3072 \sqrt[3]{2 x - 5} - 96 \sqrt[3]{{(2 x - 5)}^{2}}}{2} - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} - \frac{32763}{2}$

Step 5.2.7.5

Subtract $96 \sqrt[3]{{(2 x - 5)}^{2}}$ from $96 \sqrt[3]{{(2 x - 5)}^{2}}$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{2 x + 32763 + 0 + 3072 \sqrt[3]{2 x - 5}}{2} - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} - \frac{32763}{2}$

Step 5.2.7.6

Add $2 x$ and $0$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = \frac{2 x + 32763 + 3072 \sqrt[3]{2 x - 5}}{2} - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} - \frac{32763}{2}$

Step 5.2.8

Simplify terms.

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Step 5.2.8.1

Combine the numerators over the common denominator.

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} + \frac{2 x + 32763 + 3072 \sqrt[3]{2 x - 5} - 32763}{2}$

Step 5.2.8.2

Combine the opposite terms in $2 x + 32763 + 3072 \sqrt[3]{2 x - 5} - 32763$ .

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Step 5.2.8.2.1

Subtract $32763$ from $32763$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} + \frac{2 x + 0 + 3072 \sqrt[3]{2 x - 5}}{2}$

Step 5.2.8.2.2

Add $2 x$ and $0$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} + \frac{2 x + 3072 \sqrt[3]{2 x - 5}}{2}$

Step 5.2.8.3

Cancel the common factor of $2 x + 3072 \sqrt[3]{2 x - 5}$ and $2$ .

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Step 5.2.8.3.1

Factor $2$ out of $2 x$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} + \frac{2 (x) + 3072 \sqrt[3]{2 x - 5}}{2}$

Step 5.2.8.3.2

Factor $2$ out of $3072 \sqrt[3]{2 x - 5}$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} + \frac{2 (x) + 2 (1536 \sqrt[3]{2 x - 5})}{2}$

Step 5.2.8.3.3

Factor $2$ out of $2 (x) + 2 (1536 \sqrt[3]{2 x - 5})$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} + \frac{2 (x + 1536 \sqrt[3]{2 x - 5})}{2}$

Step 5.2.8.3.4

Cancel the common factors.

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Step 5.2.8.3.4.1

Factor $2$ out of $2$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} + \frac{2 (x + 1536 \sqrt[3]{2 x - 5})}{2 (1)}$

Step 5.2.8.3.4.2

Cancel the common factor.

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} + \frac{2 (x + 1536 \sqrt[3]{2 x - 5})}{2 \cdot 1}$

Step 5.2.8.3.4.3

Rewrite the expression.

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} + \frac{x + 1536 \sqrt[3]{2 x - 5}}{1}$

Step 5.2.8.3.4.4

Divide $x + 1536 \sqrt[3]{2 x - 5}$ by $1$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = - 3072 \sqrt[3]{2 x - 5} + 1536 \sqrt[3]{2 x - 5} + x + 1536 \sqrt[3]{2 x - 5}$

Step 5.2.8.4

Add $- 3072 \sqrt[3]{2 x - 5}$ and $1536 \sqrt[3]{2 x - 5}$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = - 1536 \sqrt[3]{2 x - 5} + x + 1536 \sqrt[3]{2 x - 5}$

Step 5.2.8.5

Combine the opposite terms in $- 1536 \sqrt[3]{2 x - 5} + x + 1536 \sqrt[3]{2 x - 5}$ .

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Step 5.2.8.5.1

Add $- 1536 \sqrt[3]{2 x - 5}$ and $1536 \sqrt[3]{2 x - 5}$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = x + 0$

Step 5.2.8.5.2

Add $x$ and $0$ .

$f^{- 1} (\frac{\sqrt[3]{2 x - 5}}{8} + 4) = x$

Step 5.3

Evaluate $f (f^{- 1} (x))$ .

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Step 5.3.1

Set up the composite result function.

$f (f^{- 1} (x))$

Step 5.3.2

Evaluate $f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2})$ by substituting in the value of $f^{- 1}$ into $f$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{2 (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) - 5}}{8} + 4$

Step 5.3.3

Simplify each term.

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Step 5.3.3.1

Simplify the numerator.

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Step 5.3.3.1.1

To write $256 x^{3}$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{2 (- 3072 x^{2} + 12288 x + 256 x^{3} \cdot \frac{2}{2} - \frac{32763}{2}) - 5}}{8} + 4$

Step 5.3.3.1.2

Combine $256 x^{3}$ and $\frac{2}{2}$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{2 (- 3072 x^{2} + 12288 x + \frac{256 x^{3} \cdot 2}{2} - \frac{32763}{2}) - 5}}{8} + 4$

Step 5.3.3.1.3

Combine the numerators over the common denominator.

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{2 (- 3072 x^{2} + 12288 x + \frac{256 x^{3} \cdot 2 - 32763}{2}) - 5}}{8} + 4$

Step 5.3.3.1.4

Multiply $2$ by $256$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{2 (- 3072 x^{2} + 12288 x + \frac{512 x^{3} - 32763}{2}) - 5}}{8} + 4$

Step 5.3.3.1.5

To write $- 3072 x^{2}$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{2 (12288 x - 3072 x^{2} \cdot \frac{2}{2} + \frac{512 x^{3} - 32763}{2}) - 5}}{8} + 4$

Step 5.3.3.1.6

Combine $- 3072 x^{2}$ and $\frac{2}{2}$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{2 (12288 x + \frac{- 3072 x^{2} \cdot 2}{2} + \frac{512 x^{3} - 32763}{2}) - 5}}{8} + 4$

Step 5.3.3.1.7

Combine the numerators over the common denominator.

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{2 (12288 x + \frac{- 3072 x^{2} \cdot 2 + 512 x^{3} - 32763}{2}) - 5}}{8} + 4$

Step 5.3.3.1.8

Simplify the numerator.

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Step 5.3.3.1.8.1

Multiply $2$ by $- 3072$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{2 (12288 x + \frac{- 6144 x^{2} + 512 x^{3} - 32763}{2}) - 5}}{8} + 4$

Step 5.3.3.1.8.2

Reorder terms.

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{2 (12288 x + \frac{512 x^{3} - 6144 x^{2} - 32763}{2}) - 5}}{8} + 4$

Step 5.3.3.1.9

To write $12288 x$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{2 (12288 x \cdot \frac{2}{2} + \frac{512 x^{3} - 6144 x^{2} - 32763}{2}) - 5}}{8} + 4$

Step 5.3.3.1.10

Combine $12288 x$ and $\frac{2}{2}$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{2 (\frac{12288 x \cdot 2}{2} + \frac{512 x^{3} - 6144 x^{2} - 32763}{2}) - 5}}{8} + 4$

Step 5.3.3.1.11

Combine the numerators over the common denominator.

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{2 (\frac{12288 x \cdot 2 + 512 x^{3} - 6144 x^{2} - 32763}{2}) - 5}}{8} + 4$

Step 5.3.3.1.12

Simplify the numerator.

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Step 5.3.3.1.12.1

Multiply $2$ by $12288$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{2 (\frac{24576 x + 512 x^{3} - 6144 x^{2} - 32763}{2}) - 5}}{8} + 4$

Step 5.3.3.1.12.2

Reorder terms.

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{2 (\frac{512 x^{3} - 6144 x^{2} + 24576 x - 32763}{2}) - 5}}{8} + 4$

Step 5.3.3.1.13

Cancel the common factor of $2$ .

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Step 5.3.3.1.13.1

Cancel the common factor.

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{2 (\frac{512 x^{3} - 6144 x^{2} + 24576 x - 32763}{2}) - 5}}{8} + 4$

Step 5.3.3.1.13.2

Rewrite the expression.

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{512 x^{3} - 6144 x^{2} + 24576 x - 32763 - 5}}{8} + 4$

Step 5.3.3.1.14

Subtract $5$ from $- 32763$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{512 x^{3} - 6144 x^{2} + 24576 x - 32768}}{8} + 4$

Step 5.3.3.1.15

Rewrite $512 x^{3} - 6144 x^{2} + 24576 x - 32768$ in a factored form.

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Step 5.3.3.1.15.1

Factor $512$ out of $512 x^{3} - 6144 x^{2} + 24576 x - 32768$ .

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Step 5.3.3.1.15.1.1

Factor $512$ out of $512 x^{3}$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{512 (x^{3}) - 6144 x^{2} + 24576 x - 32768}}{8} + 4$

Step 5.3.3.1.15.1.2

Factor $512$ out of $- 6144 x^{2}$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{512 (x^{3}) + 512 (- 12 x^{2}) + 24576 x - 32768}}{8} + 4$

Step 5.3.3.1.15.1.3

Factor $512$ out of $24576 x$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{512 (x^{3}) + 512 (- 12 x^{2}) + 512 (48 x) - 32768}}{8} + 4$

Step 5.3.3.1.15.1.4

Factor $512$ out of $- 32768$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{512 x^{3} + 512 (- 12 x^{2}) + 512 (48 x) + 512 \cdot - 64}}{8} + 4$

Step 5.3.3.1.15.1.5

Factor $512$ out of $512 x^{3} + 512 (- 12 x^{2})$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{512 (x^{3} - 12 x^{2}) + 512 (48 x) + 512 \cdot - 64}}{8} + 4$

Step 5.3.3.1.15.1.6

Factor $512$ out of $512 (x^{3} - 12 x^{2}) + 512 (48 x)$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{512 (x^{3} - 12 x^{2} + 48 x) + 512 \cdot - 64}}{8} + 4$

Step 5.3.3.1.15.1.7

Factor $512$ out of $512 (x^{3} - 12 x^{2} + 48 x) + 512 \cdot - 64$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{512 (x^{3} - 12 x^{2} + 48 x - 64)}}{8} + 4$

Step 5.3.3.1.15.2

Factor $x^{3} - 12 x^{2} + 48 x - 64$ using the rational roots test.

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Step 5.3.3.1.15.2.1

If a polynomial function has integer coefficients, then every rational zero will have the form $\frac{p}{q}$ where $p$ is a factor of the constant and $q$ is a factor of the leading coefficient.

$p = \pm 1, \pm 64, \pm 2, \pm 32, \pm 4, \pm 16, \pm 8$

$q = \pm 1$

Step 5.3.3.1.15.2.2

Find every combination of $\pm \frac{p}{q}$ . These are the possible roots of the polynomial function.

$\pm 1, \pm 64, \pm 2, \pm 32, \pm 4, \pm 16, \pm 8$

Step 5.3.3.1.15.2.3

Substitute $4$ and simplify the expression. In this case, the expression is equal to $0$ so $4$ is a root of the polynomial.

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Step 5.3.3.1.15.2.3.1

Substitute $4$ into the polynomial.

$4^{3} - 12 \cdot 4^{2} + 48 \cdot 4 - 64$

Step 5.3.3.1.15.2.3.2

Raise $4$ to the power of $3$ .

$64 - 12 \cdot 4^{2} + 48 \cdot 4 - 64$

Step 5.3.3.1.15.2.3.3

Raise $4$ to the power of $2$ .

$64 - 12 \cdot 16 + 48 \cdot 4 - 64$

Step 5.3.3.1.15.2.3.4

Multiply $- 12$ by $16$ .

$64 - 192 + 48 \cdot 4 - 64$

Step 5.3.3.1.15.2.3.5

Subtract $192$ from $64$ .

$- 128 + 48 \cdot 4 - 64$

Step 5.3.3.1.15.2.3.6

Multiply $48$ by $4$ .

$- 128 + 192 - 64$

Step 5.3.3.1.15.2.3.7

Add $- 128$ and $192$ .

$64 - 64$

Step 5.3.3.1.15.2.3.8

Subtract $64$ from $64$ .

$0$

Step 5.3.3.1.15.2.4

Since $4$ is a known root, divide the polynomial by $x - 4$ to find the quotient polynomial. This polynomial can then be used to find the remaining roots.

$\frac{x^{3} - 12 x^{2} + 48 x - 64}{x - 4}$

Step 5.3.3.1.15.2.5

Divide $x^{3} - 12 x^{2} + 48 x - 64$ by $x - 4$ .

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Step 5.3.3.1.15.2.5.1

Set up the polynomials to be divided. If there is not a term for every exponent, insert one with a value of $0$ .

$x$

$4$

$x^{3}$

$12 x^{2}$

$48 x$

$64$

Step 5.3.3.1.15.2.5.2

Divide the highest order term in the dividend $x^{3}$ by the highest order term in divisor $x$ .

					$x^{2}$
	$x$	-	$4$		$x^{3}$	-	$12 x^{2}$	+	$48 x$	-	$64$

Step 5.3.3.1.15.2.5.3

Multiply the new quotient term by the divisor.

				$x^{2}$
$x$	-	$4$		$x^{3}$	-	$12 x^{2}$	+	$48 x$	-	$64$
			+	$x^{3}$	-	$4 x^{2}$

Step 5.3.3.1.15.2.5.4

The expression needs to be subtracted from the dividend, so change all the signs in $x^{3} - 4 x^{2}$

				$x^{2}$
$x$	-	$4$		$x^{3}$	-	$12 x^{2}$	+	$48 x$	-	$64$
			-	$x^{3}$	+	$4 x^{2}$

Step 5.3.3.1.15.2.5.5

After changing the signs, add the last dividend from the multiplied polynomial to find the new dividend.

				$x^{2}$
$x$	-	$4$		$x^{3}$	-	$12 x^{2}$	+	$48 x$	-	$64$
			-	$x^{3}$	+	$4 x^{2}$
					-	$8 x^{2}$

Step 5.3.3.1.15.2.5.6

Pull the next terms from the original dividend down into the current dividend.

				$x^{2}$
$x$	-	$4$		$x^{3}$	-	$12 x^{2}$	+	$48 x$	-	$64$
			-	$x^{3}$	+	$4 x^{2}$
					-	$8 x^{2}$	+	$48 x$

Step 5.3.3.1.15.2.5.7

Divide the highest order term in the dividend $- 8 x^{2}$ by the highest order term in divisor $x$ .

				$x^{2}$	-	$8 x$
$x$	-	$4$		$x^{3}$	-	$12 x^{2}$	+	$48 x$	-	$64$
			-	$x^{3}$	+	$4 x^{2}$
					-	$8 x^{2}$	+	$48 x$

Step 5.3.3.1.15.2.5.8

Multiply the new quotient term by the divisor.

				$x^{2}$	-	$8 x$
$x$	-	$4$		$x^{3}$	-	$12 x^{2}$	+	$48 x$	-	$64$
			-	$x^{3}$	+	$4 x^{2}$
					-	$8 x^{2}$	+	$48 x$
					-	$8 x^{2}$	+	$32 x$

Step 5.3.3.1.15.2.5.9

The expression needs to be subtracted from the dividend, so change all the signs in $- 8 x^{2} + 32 x$

				$x^{2}$	-	$8 x$
$x$	-	$4$		$x^{3}$	-	$12 x^{2}$	+	$48 x$	-	$64$
			-	$x^{3}$	+	$4 x^{2}$
					-	$8 x^{2}$	+	$48 x$
					+	$8 x^{2}$	-	$32 x$

Step 5.3.3.1.15.2.5.10

After changing the signs, add the last dividend from the multiplied polynomial to find the new dividend.

				$x^{2}$	-	$8 x$
$x$	-	$4$		$x^{3}$	-	$12 x^{2}$	+	$48 x$	-	$64$
			-	$x^{3}$	+	$4 x^{2}$
					-	$8 x^{2}$	+	$48 x$
					+	$8 x^{2}$	-	$32 x$
							+	$16 x$

Step 5.3.3.1.15.2.5.11

Pull the next terms from the original dividend down into the current dividend.

				$x^{2}$	-	$8 x$
$x$	-	$4$		$x^{3}$	-	$12 x^{2}$	+	$48 x$	-	$64$
			-	$x^{3}$	+	$4 x^{2}$
					-	$8 x^{2}$	+	$48 x$
					+	$8 x^{2}$	-	$32 x$
							+	$16 x$	-	$64$

Step 5.3.3.1.15.2.5.12

Divide the highest order term in the dividend $16 x$ by the highest order term in divisor $x$ .

				$x^{2}$	-	$8 x$	+	$16$
$x$	-	$4$		$x^{3}$	-	$12 x^{2}$	+	$48 x$	-	$64$
			-	$x^{3}$	+	$4 x^{2}$
					-	$8 x^{2}$	+	$48 x$
					+	$8 x^{2}$	-	$32 x$
							+	$16 x$	-	$64$

Step 5.3.3.1.15.2.5.13

Multiply the new quotient term by the divisor.

				$x^{2}$	-	$8 x$	+	$16$
$x$	-	$4$		$x^{3}$	-	$12 x^{2}$	+	$48 x$	-	$64$
			-	$x^{3}$	+	$4 x^{2}$
					-	$8 x^{2}$	+	$48 x$
					+	$8 x^{2}$	-	$32 x$
							+	$16 x$	-	$64$
							+	$16 x$	-	$64$

Step 5.3.3.1.15.2.5.14

The expression needs to be subtracted from the dividend, so change all the signs in $16 x - 64$

				$x^{2}$	-	$8 x$	+	$16$
$x$	-	$4$		$x^{3}$	-	$12 x^{2}$	+	$48 x$	-	$64$
			-	$x^{3}$	+	$4 x^{2}$
					-	$8 x^{2}$	+	$48 x$
					+	$8 x^{2}$	-	$32 x$
							+	$16 x$	-	$64$
							-	$16 x$	+	$64$

Step 5.3.3.1.15.2.5.15

After changing the signs, add the last dividend from the multiplied polynomial to find the new dividend.

				$x^{2}$	-	$8 x$	+	$16$
$x$	-	$4$		$x^{3}$	-	$12 x^{2}$	+	$48 x$	-	$64$
			-	$x^{3}$	+	$4 x^{2}$
					-	$8 x^{2}$	+	$48 x$
					+	$8 x^{2}$	-	$32 x$
							+	$16 x$	-	$64$
							-	$16 x$	+	$64$
										$0$

Step 5.3.3.1.15.2.5.16

Since the remander is $0$ , the final answer is the quotient.

$x^{2} - 8 x + 16$

Step 5.3.3.1.15.2.6

Write $x^{3} - 12 x^{2} + 48 x - 64$ as a set of factors.

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{512 ((x - 4) (x^{2} - 8 x + 16))}}{8} + 4$

Step 5.3.3.1.15.3

Factor using the perfect square rule.

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Step 5.3.3.1.15.3.1

Rewrite $16$ as $4^{2}$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{512 ((x - 4) (x^{2} - 8 x + 4^{2}))}}{8} + 4$

Step 5.3.3.1.15.3.2

Check that the middle term is two times the product of the numbers being squared in the first term and third term.

$8 x = 2 \cdot x \cdot 4$

Step 5.3.3.1.15.3.3

Rewrite the polynomial.

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{512 ((x - 4) (x^{2} - 2 \cdot x \cdot 4 + 4^{2}))}}{8} + 4$

Step 5.3.3.1.15.3.4

Factor using the perfect square trinomial rule $a^{2} - 2 a b + b^{2} = {(a - b)}^{2}$ , where $a = x$ and $b = 4$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{512 ((x - 4) {(x - 4)}^{2})}}{8} + 4$

Step 5.3.3.1.15.4

Combine like factors.

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Step 5.3.3.1.15.4.1

Raise $x - 4$ to the power of $1$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{512 ((x - 4) {(x - 4)}^{2})}}{8} + 4$

Step 5.3.3.1.15.4.2

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

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{512 {(x - 4)}^{1 + 2}}}{8} + 4$

Step 5.3.3.1.15.4.3

Add $1$ and $2$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{512 {(x - 4)}^{3}}}{8} + 4$

Step 5.3.3.1.16

Rewrite $512 {(x - 4)}^{3}$ as ${(8 (x - 4))}^{3}$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{\sqrt[3]{{(8 (x - 4))}^{3}}}{8} + 4$

Step 5.3.3.1.17

Pull terms out from under the radical, assuming real numbers.

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{8 (x - 4)}{8} + 4$

Step 5.3.3.1.18

Apply the distributive property.

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{8 x + 8 \cdot - 4}{8} + 4$

Step 5.3.3.1.19

Multiply $8$ by $- 4$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{8 x - 32}{8} + 4$

Step 5.3.3.1.20

Factor $8$ out of $8 x - 32$ .

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Step 5.3.3.1.20.1

Factor $8$ out of $8 x$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{8 (x) - 32}{8} + 4$

Step 5.3.3.1.20.2

Factor $8$ out of $- 32$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{8 x + 8 \cdot - 4}{8} + 4$

Step 5.3.3.1.20.3

Factor $8$ out of $8 x + 8 \cdot - 4$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{8 (x - 4)}{8} + 4$

Step 5.3.3.2

Cancel the common factor of $8$ .

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Step 5.3.3.2.1

Cancel the common factor.

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = \frac{8 (x - 4)}{8} + 4$

Step 5.3.3.2.2

Divide $x - 4$ by $1$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = x - 4 + 4$

Step 5.3.4

Combine the opposite terms in $x - 4 + 4$ .

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Step 5.3.4.1

Add $- 4$ and $4$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = x + 0$

Step 5.3.4.2

Add $x$ and $0$ .

$f (256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}) = x$

Step 5.4

Since $f^{- 1} (f (x)) = x$ and $f (f^{- 1} (x)) = x$ , then $f^{- 1} (x) = 256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}$ is the inverse of $f (x) = \frac{\sqrt[3]{2 x - 5}}{8} + 4$ .

$f^{- 1} (x) = 256 x^{3} - 3072 x^{2} + 12288 x - \frac{32763}{2}$