Finite Math Examples

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

Step 1

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

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

Step 2

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

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Step 2.1

Reorder $\frac{2}{3}$ and $x^{2}$ .

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

Step 2.2

Factor $x^{\frac{1}{3}}$ out of $3 x^{3}$ .

$f (x) = x^{\frac{1}{3}} (3 x^{\frac{8}{3}}) + x^{2} (\frac{2}{3}) - x + 3 x^{\frac{1}{3}}$

Step 2.3

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

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

Step 2.4

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

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

Step 2.5

Factor $x^{\frac{1}{3}}$ out of $3 x^{\frac{1}{3}}$ .

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

Step 2.6

Factor $x^{\frac{1}{3}}$ out of $x^{\frac{1}{3}} (3 x^{\frac{8}{3}}) + x^{\frac{1}{3}} (x^{\frac{5}{3}} \frac{2}{3})$ .

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

Step 2.7

Factor $x^{\frac{1}{3}}$ out of $x^{\frac{1}{3}} (3 x^{\frac{8}{3}} + x^{\frac{5}{3}} \frac{2}{3}) + x^{\frac{1}{3}} (- x^{\frac{2}{3}})$ .

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

Step 2.8

Factor $x^{\frac{1}{3}}$ out of $x^{\frac{1}{3}} (3 x^{\frac{8}{3}} + x^{\frac{5}{3}} \frac{2}{3} - x^{\frac{2}{3}}) + x^{\frac{1}{3}} \cdot 3$ .

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

Step 3

Combine $x^{\frac{5}{3}}$ and $\frac{2}{3}$ .

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

Step 4

Move $2$ to the left of $x^{\frac{5}{3}}$ .

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

Step 5

Multiply $2$ by $x^{\frac{5}{3}}$ .

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

Step 6

Reorder terms.

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

Step 7

To write $3 x^{\frac{8}{3}}$ as a fraction with a common denominator, multiply by $\frac{3}{3}$ .

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

Step 8

Combine $3 x^{\frac{8}{3}}$ and $\frac{3}{3}$ .

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

Step 9

Combine the numerators over the common denominator.

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

Step 10

Simplify the numerator.

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Step 10.1

Factor $x^{\frac{5}{3}}$ out of $3 x^{\frac{8}{3}} \cdot 3 + 2 x^{\frac{5}{3}}$ .

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Step 10.1.1

Move $x^{\frac{8}{3}}$ .

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

Step 10.1.2

Factor $x^{\frac{5}{3}}$ out of $3 \cdot 3 x^{\frac{8}{3}}$ .

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

Step 10.1.3

Factor $x^{\frac{5}{3}}$ out of $2 x^{\frac{5}{3}}$ .

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

Step 10.1.4

Factor $x^{\frac{5}{3}}$ out of $x^{\frac{5}{3}} (3 \cdot 3 x^{\frac{3}{3}}) + x^{\frac{5}{3}} \cdot 2$ .

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

Step 10.2

Multiply $3$ by $3$ .

$f (x) = x^{\frac{1}{3}} (- x^{\frac{2}{3}} + \frac{x^{\frac{5}{3}} (9 x^{\frac{3}{3}} + 2)}{3} + 3)$

Step 10.3

Divide $3$ by $3$ .

$f (x) = x^{\frac{1}{3}} (- x^{\frac{2}{3}} + \frac{x^{\frac{5}{3}} (9 x + 2)}{3} + 3)$

Step 10.4

Simplify.

$f (x) = x^{\frac{1}{3}} (- x^{\frac{2}{3}} + \frac{x^{\frac{5}{3}} (9 x + 2)}{3} + 3)$

Step 11

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

$f (x) = x^{\frac{1}{3}} (- x^{\frac{2}{3}} \cdot \frac{3}{3} + \frac{x^{\frac{5}{3}} (9 x + 2)}{3} + 3)$

Step 12

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

$f (x) = x^{\frac{1}{3}} (\frac{- x^{\frac{2}{3}} \cdot 3}{3} + \frac{x^{\frac{5}{3}} (9 x + 2)}{3} + 3)$

Step 13

Combine the numerators over the common denominator.

$f (x) = x^{\frac{1}{3}} (\frac{- x^{\frac{2}{3}} \cdot 3 + x^{\frac{5}{3}} (9 x + 2)}{3} + 3)$

Step 14

Simplify the numerator.

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Step 14.1

Factor $x^{\frac{2}{3}}$ out of $- x^{\frac{2}{3}} \cdot 3 + x^{\frac{5}{3}} (9 x + 2)$ .

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Step 14.1.1

Move $x^{\frac{2}{3}}$ .

$f (x) = x^{\frac{1}{3}} (\frac{- 1 \cdot (3 x^{\frac{2}{3}}) + x^{\frac{5}{3}} (9 x + 2)}{3} + 3)$

Step 14.1.2

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

$f (x) = x^{\frac{1}{3}} (\frac{x^{\frac{2}{3}} (- 1 \cdot 3) + x^{\frac{5}{3}} (9 x + 2)}{3} + 3)$

Step 14.1.3

Factor $x^{\frac{2}{3}}$ out of $x^{\frac{5}{3}} (9 x + 2)$ .

$f (x) = x^{\frac{1}{3}} (\frac{x^{\frac{2}{3}} (- 1 \cdot 3) + x^{\frac{2}{3}} (x^{\frac{3}{3}} (9 x + 2))}{3} + 3)$

Step 14.1.4

Factor $x^{\frac{2}{3}}$ out of $x^{\frac{2}{3}} (- 1 \cdot 3) + x^{\frac{2}{3}} (x^{\frac{3}{3}} (9 x + 2))$ .

$f (x) = x^{\frac{1}{3}} (\frac{x^{\frac{2}{3}} (- 1 \cdot 3 + x^{\frac{3}{3}} (9 x + 2))}{3} + 3)$

Step 14.2

Multiply $- 1$ by $3$ .

$f (x) = x^{\frac{1}{3}} (\frac{x^{\frac{2}{3}} (- 3 + x^{\frac{3}{3}} (9 x + 2))}{3} + 3)$

Step 14.3

Divide $3$ by $3$ .

$f (x) = x^{\frac{1}{3}} (\frac{x^{\frac{2}{3}} (- 3 + x (9 x + 2))}{3} + 3)$

Step 14.4

Simplify.

$f (x) = x^{\frac{1}{3}} (\frac{x^{\frac{2}{3}} (- 3 + x (9 x + 2))}{3} + 3)$

Step 14.5

Apply the distributive property.

$f (x) = x^{\frac{1}{3}} (\frac{x^{\frac{2}{3}} (- 3 + x (9 x) + x \cdot 2)}{3} + 3)$

Step 14.6

Rewrite using the commutative property of multiplication.

$f (x) = x^{\frac{1}{3}} (\frac{x^{\frac{2}{3}} (- 3 + 9 x \cdot x + x \cdot 2)}{3} + 3)$

Step 14.7

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

$f (x) = x^{\frac{1}{3}} (\frac{x^{\frac{2}{3}} (- 3 + 9 x \cdot x + 2 \cdot x)}{3} + 3)$

Step 14.8

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

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Step 14.8.1

Move $x$ .

$f (x) = x^{\frac{1}{3}} (\frac{x^{\frac{2}{3}} (- 3 + 9 (x \cdot x) + 2 \cdot x)}{3} + 3)$

Step 14.8.2

Multiply $x$ by $x$ .

$f (x) = x^{\frac{1}{3}} (\frac{x^{\frac{2}{3}} (- 3 + 9 x^{2} + 2 \cdot x)}{3} + 3)$

$f (x) = x^{\frac{1}{3}} (\frac{x^{\frac{2}{3}} (- 3 + 9 x^{2} + 2 x)}{3} + 3)$

Step 14.9

Reorder terms.

$f (x) = x^{\frac{1}{3}} (\frac{x^{\frac{2}{3}} (9 x^{2} + 2 x - 3)}{3} + 3)$

Step 15

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

$f (x) = x^{\frac{1}{3}} (\frac{x^{\frac{2}{3}} (9 x^{2} + 2 x - 3)}{3} + 3 \cdot \frac{3}{3})$

Step 16

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

$f (x) = x^{\frac{1}{3}} (\frac{x^{\frac{2}{3}} (9 x^{2} + 2 x - 3)}{3} + \frac{3 \cdot 3}{3})$

Step 17

Combine the numerators over the common denominator.

$f (x) = x^{\frac{1}{3}} (\frac{x^{\frac{2}{3}} (9 x^{2} + 2 x - 3) + 3 \cdot 3}{3})$

Step 18

Simplify the numerator.

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Step 18.1

Apply the distributive property.

$f (x) = x^{\frac{1}{3}} (\frac{x^{\frac{2}{3}} (9 x^{2}) + x^{\frac{2}{3}} (2 x) + x^{\frac{2}{3}} \cdot - 3 + 3 \cdot 3}{3})$

Step 18.2

Simplify.

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Step 18.2.1

Rewrite using the commutative property of multiplication.

$f (x) = x^{\frac{1}{3}} (\frac{9 x^{\frac{2}{3}} x^{2} + x^{\frac{2}{3}} (2 x) + x^{\frac{2}{3}} \cdot - 3 + 3 \cdot 3}{3})$

Step 18.2.2

Rewrite using the commutative property of multiplication.

$f (x) = x^{\frac{1}{3}} (\frac{9 x^{\frac{2}{3}} x^{2} + 2 x^{\frac{2}{3}} x + x^{\frac{2}{3}} \cdot - 3 + 3 \cdot 3}{3})$

Step 18.2.3

Move $- 3$ to the left of $x^{\frac{2}{3}}$ .

$f (x) = x^{\frac{1}{3}} (\frac{9 x^{\frac{2}{3}} x^{2} + 2 x^{\frac{2}{3}} x - 3 \cdot x^{\frac{2}{3}} + 3 \cdot 3}{3})$

Step 18.3

Simplify each term.

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Step 18.3.1

Multiply $x^{\frac{2}{3}}$ by $x^{2}$ by adding the exponents.

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Step 18.3.1.1

Move $x^{2}$ .

$f (x) = x^{\frac{1}{3}} (\frac{9 (x^{2} x^{\frac{2}{3}}) + 2 x^{\frac{2}{3}} x - 3 \cdot x^{\frac{2}{3}} + 3 \cdot 3}{3})$

Step 18.3.1.2

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

$f (x) = x^{\frac{1}{3}} (\frac{9 x^{2 + \frac{2}{3}} + 2 x^{\frac{2}{3}} x - 3 \cdot x^{\frac{2}{3}} + 3 \cdot 3}{3})$

Step 18.3.1.3

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

$f (x) = x^{\frac{1}{3}} (\frac{9 x^{2 \cdot \frac{3}{3} + \frac{2}{3}} + 2 x^{\frac{2}{3}} x - 3 \cdot x^{\frac{2}{3}} + 3 \cdot 3}{3})$

Step 18.3.1.4

Combine $2$ and $\frac{3}{3}$ .

$f (x) = x^{\frac{1}{3}} (\frac{9 x^{\frac{2 \cdot 3}{3} + \frac{2}{3}} + 2 x^{\frac{2}{3}} x - 3 \cdot x^{\frac{2}{3}} + 3 \cdot 3}{3})$

Step 18.3.1.5

Combine the numerators over the common denominator.

$f (x) = x^{\frac{1}{3}} (\frac{9 x^{\frac{2 \cdot 3 + 2}{3}} + 2 x^{\frac{2}{3}} x - 3 \cdot x^{\frac{2}{3}} + 3 \cdot 3}{3})$

Step 18.3.1.6

Simplify the numerator.

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Step 18.3.1.6.1

Multiply $2$ by $3$ .

$f (x) = x^{\frac{1}{3}} (\frac{9 x^{\frac{6 + 2}{3}} + 2 x^{\frac{2}{3}} x - 3 \cdot x^{\frac{2}{3}} + 3 \cdot 3}{3})$

Step 18.3.1.6.2

Add $6$ and $2$ .

$f (x) = x^{\frac{1}{3}} (\frac{9 x^{\frac{8}{3}} + 2 x^{\frac{2}{3}} x - 3 \cdot x^{\frac{2}{3}} + 3 \cdot 3}{3})$

Step 18.3.2

Multiply $x^{\frac{2}{3}}$ by $x$ by adding the exponents.

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Step 18.3.2.1

Move $x$ .

$f (x) = x^{\frac{1}{3}} (\frac{9 x^{\frac{8}{3}} + 2 (x \cdot x^{\frac{2}{3}}) - 3 \cdot x^{\frac{2}{3}} + 3 \cdot 3}{3})$

Step 18.3.2.2

Multiply $x$ by $x^{\frac{2}{3}}$ .

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Step 18.3.2.2.1

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

$f (x) = x^{\frac{1}{3}} (\frac{9 x^{\frac{8}{3}} + 2 (x \cdot x^{\frac{2}{3}}) - 3 \cdot x^{\frac{2}{3}} + 3 \cdot 3}{3})$

Step 18.3.2.2.2

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

$f (x) = x^{\frac{1}{3}} (\frac{9 x^{\frac{8}{3}} + 2 x^{1 + \frac{2}{3}} - 3 \cdot x^{\frac{2}{3}} + 3 \cdot 3}{3})$

Step 18.3.2.3

Write $1$ as a fraction with a common denominator.

$f (x) = x^{\frac{1}{3}} (\frac{9 x^{\frac{8}{3}} + 2 x^{\frac{3}{3} + \frac{2}{3}} - 3 \cdot x^{\frac{2}{3}} + 3 \cdot 3}{3})$

Step 18.3.2.4

Combine the numerators over the common denominator.

$f (x) = x^{\frac{1}{3}} (\frac{9 x^{\frac{8}{3}} + 2 x^{\frac{3 + 2}{3}} - 3 \cdot x^{\frac{2}{3}} + 3 \cdot 3}{3})$

Step 18.3.2.5

Add $3$ and $2$ .

$f (x) = x^{\frac{1}{3}} (\frac{9 x^{\frac{8}{3}} + 2 x^{\frac{5}{3}} - 3 \cdot x^{\frac{2}{3}} + 3 \cdot 3}{3})$

$f (x) = x^{\frac{1}{3}} (\frac{9 x^{\frac{8}{3}} + 2 x^{\frac{5}{3}} - 3 x^{\frac{2}{3}} + 3 \cdot 3}{3})$

Step 18.4

Multiply $3$ by $3$ .

$f (x) = x^{\frac{1}{3}} (\frac{9 x^{\frac{8}{3}} + 2 x^{\frac{5}{3}} - 3 x^{\frac{2}{3}} + 9}{3})$