Pre-Algebra Examples

$20 x^{4} - 12 x^{3} - x^{2} + 18 x - 20 \div 4 x^{2} - 5$

Step 1

Find where the expression $20 x^{4} - 12 x^{3} - x^{2} + 18 x - \frac{5}{x^{2}} - 5$ is undefined.

$x = 0$

Step 2

Consider the rational function $R (x) = \frac{a x^{n}}{b x^{m}}$ where $n$ is the degree of the numerator and $m$ is the degree of the denominator.

1. If $n < m$ , then the x-axis, $y = 0$ , is the horizontal asymptote.

2. If $n = m$ , then the horizontal asymptote is the line $y = \frac{a}{b}$ .

3. If $n > m$ , then there is no horizontal asymptote (there is an oblique asymptote).

Step 3

Find $n$ and $m$ .

$n = 6$

$m = 2$

Step 4

Since $n > m$ , there is no horizontal asymptote.

No Horizontal Asymptotes

Step 5

Find the oblique asymptote using polynomial division.

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Step 5.1

Combine.

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Step 5.1.1

To write $20 x^{4}$ as a fraction with a common denominator, multiply by $\frac{x^{2}}{x^{2}}$ .

$- 12 x^{3} - x^{2} + 18 x + \frac{20 x^{4} x^{2}}{x^{2}} - \frac{5}{x^{2}} - 5$

Step 5.1.2

Combine the numerators over the common denominator.

$- 12 x^{3} - x^{2} + 18 x + \frac{20 x^{4} x^{2} - 5}{x^{2}} - 5$

Step 5.1.3

Simplify the numerator.

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Step 5.1.3.1

Factor $5$ out of $20 x^{4} x^{2} - 5$ .

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Step 5.1.3.1.1

Factor $5$ out of $20 x^{4} x^{2}$ .

$- 12 x^{3} - x^{2} + 18 x + \frac{5 (4 x^{4} x^{2}) - 5}{x^{2}} - 5$

Step 5.1.3.1.2

Factor $5$ out of $- 5$ .

$- 12 x^{3} - x^{2} + 18 x + \frac{5 (4 x^{4} x^{2}) + 5 (- 1)}{x^{2}} - 5$

Step 5.1.3.1.3

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

$- 12 x^{3} - x^{2} + 18 x + \frac{5 (4 x^{4} x^{2} - 1)}{x^{2}} - 5$

Step 5.1.3.2

Rewrite $4 x^{4} x^{2}$ as ${(2 x^{2} x)}^{2}$ .

$- 12 x^{3} - x^{2} + 18 x + \frac{5 ({(2 x^{2} x)}^{2} - 1)}{x^{2}} - 5$

Step 5.1.3.3

Rewrite $1$ as $1^{2}$ .

$- 12 x^{3} - x^{2} + 18 x + \frac{5 ({(2 x^{2} x)}^{2} - 1^{2})}{x^{2}} - 5$

Step 5.1.3.4

Since both terms are perfect squares, factor using the difference of squares formula, $a^{2} - b^{2} = (a + b) (a - b)$ where $a = 2 x^{2} x$ and $b = 1$ .

$- 12 x^{3} - x^{2} + 18 x + \frac{5 ((2 x^{2} x + 1) (2 x^{2} x - 1))}{x^{2}} - 5$

Step 5.1.3.5

Simplify.

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Step 5.1.3.5.1

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

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Step 5.1.3.5.1.1

Move $x$ .

$- 12 x^{3} - x^{2} + 18 x + \frac{5 ((2 (x \cdot x^{2}) + 1) (2 x^{2} x - 1))}{x^{2}} - 5$

Step 5.1.3.5.1.2

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

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Step 5.1.3.5.1.2.1

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

$- 12 x^{3} - x^{2} + 18 x + \frac{5 ((2 (x^{1} x^{2}) + 1) (2 x^{2} x - 1))}{x^{2}} - 5$

Step 5.1.3.5.1.2.2

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

$- 12 x^{3} - x^{2} + 18 x + \frac{5 ((2 x^{1 + 2} + 1) (2 x^{2} x - 1))}{x^{2}} - 5$

Step 5.1.3.5.1.3

Add $1$ and $2$ .

$- 12 x^{3} - x^{2} + 18 x + \frac{5 ((2 x^{3} + 1) (2 x^{2} x - 1))}{x^{2}} - 5$

Step 5.1.3.5.2

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

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Step 5.1.3.5.2.1

Move $x$ .

$- 12 x^{3} - x^{2} + 18 x + \frac{5 ((2 x^{3} + 1) (2 (x \cdot x^{2}) - 1))}{x^{2}} - 5$

Step 5.1.3.5.2.2

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

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Step 5.1.3.5.2.2.1

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

$- 12 x^{3} - x^{2} + 18 x + \frac{5 ((2 x^{3} + 1) (2 (x^{1} x^{2}) - 1))}{x^{2}} - 5$

Step 5.1.3.5.2.2.2

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

$- 12 x^{3} - x^{2} + 18 x + \frac{5 ((2 x^{3} + 1) (2 x^{1 + 2} - 1))}{x^{2}} - 5$

Step 5.1.3.5.2.3

Add $1$ and $2$ .

$- 12 x^{3} - x^{2} + 18 x + \frac{5 ((2 x^{3} + 1) (2 x^{3} - 1))}{x^{2}} - 5$

$- 12 x^{3} - x^{2} + 18 x + \frac{5 (2 x^{3} + 1) (2 x^{3} - 1)}{x^{2}} - 5$

Step 5.1.4

Find the common denominator.

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Step 5.1.4.1

Write $- 12 x^{3}$ as a fraction with denominator $1$ .

$\frac{- 12 x^{3}}{1} - x^{2} + 18 x + \frac{5 (2 x^{3} + 1) (2 x^{3} - 1)}{x^{2}} - 5$

Step 5.1.4.2

Multiply $\frac{- 12 x^{3}}{1}$ by $\frac{x^{2}}{x^{2}}$ .

$\frac{- 12 x^{3}}{1} \cdot \frac{x^{2}}{x^{2}} - x^{2} + 18 x + \frac{5 (2 x^{3} + 1) (2 x^{3} - 1)}{x^{2}} - 5$

Step 5.1.4.3

Multiply $\frac{- 12 x^{3}}{1}$ by $\frac{x^{2}}{x^{2}}$ .

$\frac{- 12 x^{3} x^{2}}{x^{2}} - x^{2} + 18 x + \frac{5 (2 x^{3} + 1) (2 x^{3} - 1)}{x^{2}} - 5$

Step 5.1.4.4

Write $- x^{2}$ as a fraction with denominator $1$ .

$\frac{- 12 x^{3} x^{2}}{x^{2}} + \frac{- x^{2}}{1} + 18 x + \frac{5 (2 x^{3} + 1) (2 x^{3} - 1)}{x^{2}} - 5$

Step 5.1.4.5

Multiply $\frac{- x^{2}}{1}$ by $\frac{x^{2}}{x^{2}}$ .

$\frac{- 12 x^{3} x^{2}}{x^{2}} + \frac{- x^{2}}{1} \cdot \frac{x^{2}}{x^{2}} + 18 x + \frac{5 (2 x^{3} + 1) (2 x^{3} - 1)}{x^{2}} - 5$

Step 5.1.4.6

Multiply $\frac{- x^{2}}{1}$ by $\frac{x^{2}}{x^{2}}$ .

$\frac{- 12 x^{3} x^{2}}{x^{2}} + \frac{- x^{2} x^{2}}{x^{2}} + 18 x + \frac{5 (2 x^{3} + 1) (2 x^{3} - 1)}{x^{2}} - 5$

Step 5.1.4.7

Write $18 x$ as a fraction with denominator $1$ .

$\frac{- 12 x^{3} x^{2}}{x^{2}} + \frac{- x^{2} x^{2}}{x^{2}} + \frac{18 x}{1} + \frac{5 (2 x^{3} + 1) (2 x^{3} - 1)}{x^{2}} - 5$

Step 5.1.4.8

Multiply $\frac{18 x}{1}$ by $\frac{x^{2}}{x^{2}}$ .

$\frac{- 12 x^{3} x^{2}}{x^{2}} + \frac{- x^{2} x^{2}}{x^{2}} + \frac{18 x}{1} \cdot \frac{x^{2}}{x^{2}} + \frac{5 (2 x^{3} + 1) (2 x^{3} - 1)}{x^{2}} - 5$

Step 5.1.4.9

Multiply $\frac{18 x}{1}$ by $\frac{x^{2}}{x^{2}}$ .

$\frac{- 12 x^{3} x^{2}}{x^{2}} + \frac{- x^{2} x^{2}}{x^{2}} + \frac{18 x \cdot x^{2}}{x^{2}} + \frac{5 (2 x^{3} + 1) (2 x^{3} - 1)}{x^{2}} - 5$

Step 5.1.4.10

Write $- 5$ as a fraction with denominator $1$ .

$\frac{- 12 x^{3} x^{2}}{x^{2}} + \frac{- x^{2} x^{2}}{x^{2}} + \frac{18 x \cdot x^{2}}{x^{2}} + \frac{5 (2 x^{3} + 1) (2 x^{3} - 1)}{x^{2}} + \frac{- 5}{1}$

Step 5.1.4.11

Multiply $\frac{- 5}{1}$ by $\frac{x^{2}}{x^{2}}$ .

$\frac{- 12 x^{3} x^{2}}{x^{2}} + \frac{- x^{2} x^{2}}{x^{2}} + \frac{18 x \cdot x^{2}}{x^{2}} + \frac{5 (2 x^{3} + 1) (2 x^{3} - 1)}{x^{2}} + \frac{- 5}{1} \cdot \frac{x^{2}}{x^{2}}$

Step 5.1.4.12

Multiply $\frac{- 5}{1}$ by $\frac{x^{2}}{x^{2}}$ .

$\frac{- 12 x^{3} x^{2}}{x^{2}} + \frac{- x^{2} x^{2}}{x^{2}} + \frac{18 x \cdot x^{2}}{x^{2}} + \frac{5 (2 x^{3} + 1) (2 x^{3} - 1)}{x^{2}} + \frac{- 5 x^{2}}{x^{2}}$

Step 5.1.5

Combine the numerators over the common denominator.

$\frac{- 12 x^{3} x^{2} - x^{2} x^{2} + 18 x \cdot x^{2} + 5 (2 x^{3} + 1) (2 x^{3} - 1) - 5 x^{2}}{x^{2}}$

Step 5.1.6

Simplify each term.

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Step 5.1.6.1

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

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Step 5.1.6.1.1

Move $x^{2}$ .

$\frac{- 12 (x^{2} x^{3}) - x^{2} x^{2} + 18 x \cdot x^{2} + 5 (2 x^{3} + 1) (2 x^{3} - 1) - 5 x^{2}}{x^{2}}$

Step 5.1.6.1.2

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

$\frac{- 12 x^{2 + 3} - x^{2} x^{2} + 18 x \cdot x^{2} + 5 (2 x^{3} + 1) (2 x^{3} - 1) - 5 x^{2}}{x^{2}}$

Step 5.1.6.1.3

Add $2$ and $3$ .

$\frac{- 12 x^{5} - x^{2} x^{2} + 18 x \cdot x^{2} + 5 (2 x^{3} + 1) (2 x^{3} - 1) - 5 x^{2}}{x^{2}}$

Step 5.1.6.2

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

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Step 5.1.6.2.1

Move $x^{2}$ .

$\frac{- 12 x^{5} - (x^{2} x^{2}) + 18 x \cdot x^{2} + 5 (2 x^{3} + 1) (2 x^{3} - 1) - 5 x^{2}}{x^{2}}$

Step 5.1.6.2.2

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

$\frac{- 12 x^{5} - x^{2 + 2} + 18 x \cdot x^{2} + 5 (2 x^{3} + 1) (2 x^{3} - 1) - 5 x^{2}}{x^{2}}$

Step 5.1.6.2.3

Add $2$ and $2$ .

$\frac{- 12 x^{5} - x^{4} + 18 x \cdot x^{2} + 5 (2 x^{3} + 1) (2 x^{3} - 1) - 5 x^{2}}{x^{2}}$

Step 5.1.6.3

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

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Step 5.1.6.3.1

Move $x^{2}$ .

$\frac{- 12 x^{5} - x^{4} + 18 (x^{2} x) + 5 (2 x^{3} + 1) (2 x^{3} - 1) - 5 x^{2}}{x^{2}}$

Step 5.1.6.3.2

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

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Step 5.1.6.3.2.1

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

$\frac{- 12 x^{5} - x^{4} + 18 (x^{2} x^{1}) + 5 (2 x^{3} + 1) (2 x^{3} - 1) - 5 x^{2}}{x^{2}}$

Step 5.1.6.3.2.2

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

$\frac{- 12 x^{5} - x^{4} + 18 x^{2 + 1} + 5 (2 x^{3} + 1) (2 x^{3} - 1) - 5 x^{2}}{x^{2}}$

Step 5.1.6.3.3

Add $2$ and $1$ .

$\frac{- 12 x^{5} - x^{4} + 18 x^{3} + 5 (2 x^{3} + 1) (2 x^{3} - 1) - 5 x^{2}}{x^{2}}$

Step 5.1.6.4

Apply the distributive property.

$\frac{- 12 x^{5} - x^{4} + 18 x^{3} + (5 (2 x^{3}) + 5 \cdot 1) (2 x^{3} - 1) - 5 x^{2}}{x^{2}}$

Step 5.1.6.5

Multiply $2$ by $5$ .

$\frac{- 12 x^{5} - x^{4} + 18 x^{3} + (10 x^{3} + 5 \cdot 1) (2 x^{3} - 1) - 5 x^{2}}{x^{2}}$

Step 5.1.6.6

Multiply $5$ by $1$ .

$\frac{- 12 x^{5} - x^{4} + 18 x^{3} + (10 x^{3} + 5) (2 x^{3} - 1) - 5 x^{2}}{x^{2}}$

Step 5.1.6.7

Expand $(10 x^{3} + 5) (2 x^{3} - 1)$ using the FOIL Method.

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Step 5.1.6.7.1

Apply the distributive property.

$\frac{- 12 x^{5} - x^{4} + 18 x^{3} + 10 x^{3} (2 x^{3} - 1) + 5 (2 x^{3} - 1) - 5 x^{2}}{x^{2}}$

Step 5.1.6.7.2

Apply the distributive property.

$\frac{- 12 x^{5} - x^{4} + 18 x^{3} + 10 x^{3} (2 x^{3}) + 10 x^{3} \cdot - 1 + 5 (2 x^{3} - 1) - 5 x^{2}}{x^{2}}$

Step 5.1.6.7.3

Apply the distributive property.

$\frac{- 12 x^{5} - x^{4} + 18 x^{3} + 10 x^{3} (2 x^{3}) + 10 x^{3} \cdot - 1 + 5 (2 x^{3}) + 5 \cdot - 1 - 5 x^{2}}{x^{2}}$

Step 5.1.6.8

Simplify and combine like terms.

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Step 5.1.6.8.1

Simplify each term.

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Step 5.1.6.8.1.1

Rewrite using the commutative property of multiplication.

$\frac{- 12 x^{5} - x^{4} + 18 x^{3} + 10 \cdot 2 x^{3} x^{3} + 10 x^{3} \cdot - 1 + 5 (2 x^{3}) + 5 \cdot - 1 - 5 x^{2}}{x^{2}}$

Step 5.1.6.8.1.2

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

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Step 5.1.6.8.1.2.1

Move $x^{3}$ .

$\frac{- 12 x^{5} - x^{4} + 18 x^{3} + 10 \cdot 2 (x^{3} x^{3}) + 10 x^{3} \cdot - 1 + 5 (2 x^{3}) + 5 \cdot - 1 - 5 x^{2}}{x^{2}}$

Step 5.1.6.8.1.2.2

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

$\frac{- 12 x^{5} - x^{4} + 18 x^{3} + 10 \cdot 2 x^{3 + 3} + 10 x^{3} \cdot - 1 + 5 (2 x^{3}) + 5 \cdot - 1 - 5 x^{2}}{x^{2}}$

Step 5.1.6.8.1.2.3

Add $3$ and $3$ .

$\frac{- 12 x^{5} - x^{4} + 18 x^{3} + 10 \cdot 2 x^{6} + 10 x^{3} \cdot - 1 + 5 (2 x^{3}) + 5 \cdot - 1 - 5 x^{2}}{x^{2}}$

Step 5.1.6.8.1.3

Multiply $10$ by $2$ .

$\frac{- 12 x^{5} - x^{4} + 18 x^{3} + 20 x^{6} + 10 x^{3} \cdot - 1 + 5 (2 x^{3}) + 5 \cdot - 1 - 5 x^{2}}{x^{2}}$

Step 5.1.6.8.1.4

Multiply $- 1$ by $10$ .

$\frac{- 12 x^{5} - x^{4} + 18 x^{3} + 20 x^{6} - 10 x^{3} + 5 (2 x^{3}) + 5 \cdot - 1 - 5 x^{2}}{x^{2}}$

Step 5.1.6.8.1.5

Multiply $2$ by $5$ .

$\frac{- 12 x^{5} - x^{4} + 18 x^{3} + 20 x^{6} - 10 x^{3} + 10 x^{3} + 5 \cdot - 1 - 5 x^{2}}{x^{2}}$

Step 5.1.6.8.1.6

Multiply $5$ by $- 1$ .

$\frac{- 12 x^{5} - x^{4} + 18 x^{3} + 20 x^{6} - 10 x^{3} + 10 x^{3} - 5 - 5 x^{2}}{x^{2}}$

Step 5.1.6.8.2

Add $- 10 x^{3}$ and $10 x^{3}$ .

$\frac{- 12 x^{5} - x^{4} + 18 x^{3} + 20 x^{6} + 0 - 5 - 5 x^{2}}{x^{2}}$

Step 5.1.6.8.3

Add $20 x^{6}$ and $0$ .

$\frac{- 12 x^{5} - x^{4} + 18 x^{3} + 20 x^{6} - 5 - 5 x^{2}}{x^{2}}$

Step 5.1.7

Simplify the expression.

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Step 5.1.7.1

Move $- 5$ .

$\frac{- 12 x^{5} - x^{4} + 18 x^{3} + 20 x^{6} - 5 x^{2} - 5}{x^{2}}$

Step 5.1.7.2

Move $18 x^{3}$ .

$\frac{- 12 x^{5} - x^{4} + 20 x^{6} + 18 x^{3} - 5 x^{2} - 5}{x^{2}}$

Step 5.1.7.3

Move $- x^{4}$ .

$\frac{- 12 x^{5} + 20 x^{6} - x^{4} + 18 x^{3} - 5 x^{2} - 5}{x^{2}}$

Step 5.1.7.4

Reorder $- 12 x^{5}$ and $20 x^{6}$ .

$\frac{20 x^{6} - 12 x^{5} - x^{4} + 18 x^{3} - 5 x^{2} - 5}{x^{2}}$

Step 5.1.8

Simplify.

$\frac{20 x^{6} - 12 x^{5} - x^{4} + 18 x^{3} - 5 x^{2} - 5}{x^{2}}$

Step 5.2

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

$x^{2}$

$0 x$

$0$

$20 x^{6}$

$12 x^{5}$

$x^{4}$

$18 x^{3}$

$5 x^{2}$

$0 x$

$5$

Step 5.3

Divide the highest order term in the dividend $20 x^{6}$ by the highest order term in divisor $x^{2}$ .

$20 x^{4}$

$x^{2}$

$0 x$

$0$

$20 x^{6}$

$12 x^{5}$

$x^{4}$

$18 x^{3}$

$5 x^{2}$

$0 x$

$5$

Step 5.4

Multiply the new quotient term by the divisor.

$20 x^{4}$

$x^{2}$

$0 x$

$0$

$20 x^{6}$

$12 x^{5}$

$x^{4}$

$18 x^{3}$

$5 x^{2}$

$0 x$

$5$

$20 x^{6}$

$0$

Step 5.5

The expression needs to be subtracted from the dividend, so change all the signs in $20 x^{6} + 0 + 0$

						$20 x^{4}$
$x^{2}$	+	$0 x$	+	$0$		$20 x^{6}$	-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$	-	$5$
					-	$20 x^{6}$	-	$0$	-	$0$

Step 5.6

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

						$20 x^{4}$
$x^{2}$	+	$0 x$	+	$0$		$20 x^{6}$	-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$	-	$5$
					-	$20 x^{6}$	-	$0$	-	$0$
							-	$12 x^{5}$	-	$x^{4}$

Step 5.7

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

						$20 x^{4}$
$x^{2}$	+	$0 x$	+	$0$		$20 x^{6}$	-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$	-	$5$
					-	$20 x^{6}$	-	$0$	-	$0$
							-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$

Step 5.8

Divide the highest order term in the dividend $- 12 x^{5}$ by the highest order term in divisor $x^{2}$ .

						$20 x^{4}$	-	$12 x^{3}$
$x^{2}$	+	$0 x$	+	$0$		$20 x^{6}$	-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$	-	$5$
					-	$20 x^{6}$	-	$0$	-	$0$
							-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$

Step 5.9

Multiply the new quotient term by the divisor.

						$20 x^{4}$	-	$12 x^{3}$
$x^{2}$	+	$0 x$	+	$0$		$20 x^{6}$	-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$	-	$5$
					-	$20 x^{6}$	-	$0$	-	$0$
							-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$
							-	$12 x^{5}$	+	$0$	+	$0$

Step 5.10

The expression needs to be subtracted from the dividend, so change all the signs in $- 12 x^{5} + 0 + 0$

						$20 x^{4}$	-	$12 x^{3}$
$x^{2}$	+	$0 x$	+	$0$		$20 x^{6}$	-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$	-	$5$
					-	$20 x^{6}$	-	$0$	-	$0$
							-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$
							+	$12 x^{5}$	-	$0$	-	$0$

Step 5.11

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

						$20 x^{4}$	-	$12 x^{3}$
$x^{2}$	+	$0 x$	+	$0$		$20 x^{6}$	-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$	-	$5$
					-	$20 x^{6}$	-	$0$	-	$0$
							-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$
							+	$12 x^{5}$	-	$0$	-	$0$
									-	$x^{4}$	+	$18 x^{3}$

Step 5.12

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

						$20 x^{4}$	-	$12 x^{3}$
$x^{2}$	+	$0 x$	+	$0$		$20 x^{6}$	-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$	-	$5$
					-	$20 x^{6}$	-	$0$	-	$0$
							-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$
							+	$12 x^{5}$	-	$0$	-	$0$
									-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$

Step 5.13

Divide the highest order term in the dividend $- x^{4}$ by the highest order term in divisor $x^{2}$ .

						$20 x^{4}$	-	$12 x^{3}$	-	$x^{2}$
$x^{2}$	+	$0 x$	+	$0$		$20 x^{6}$	-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$	-	$5$
					-	$20 x^{6}$	-	$0$	-	$0$
							-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$
							+	$12 x^{5}$	-	$0$	-	$0$
									-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$

Step 5.14

Multiply the new quotient term by the divisor.

						$20 x^{4}$	-	$12 x^{3}$	-	$x^{2}$
$x^{2}$	+	$0 x$	+	$0$		$20 x^{6}$	-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$	-	$5$
					-	$20 x^{6}$	-	$0$	-	$0$
							-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$
							+	$12 x^{5}$	-	$0$	-	$0$
									-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$
									-	$x^{4}$	+	$0$	+	$0$

Step 5.15

The expression needs to be subtracted from the dividend, so change all the signs in $- x^{4} + 0 + 0$

						$20 x^{4}$	-	$12 x^{3}$	-	$x^{2}$
$x^{2}$	+	$0 x$	+	$0$		$20 x^{6}$	-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$	-	$5$
					-	$20 x^{6}$	-	$0$	-	$0$
							-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$
							+	$12 x^{5}$	-	$0$	-	$0$
									-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$
									+	$x^{4}$	-	$0$	-	$0$

Step 5.16

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

						$20 x^{4}$	-	$12 x^{3}$	-	$x^{2}$
$x^{2}$	+	$0 x$	+	$0$		$20 x^{6}$	-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$	-	$5$
					-	$20 x^{6}$	-	$0$	-	$0$
							-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$
							+	$12 x^{5}$	-	$0$	-	$0$
									-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$
									+	$x^{4}$	-	$0$	-	$0$
											+	$18 x^{3}$	-	$5 x^{2}$

Step 5.17

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

						$20 x^{4}$	-	$12 x^{3}$	-	$x^{2}$
$x^{2}$	+	$0 x$	+	$0$		$20 x^{6}$	-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$	-	$5$
					-	$20 x^{6}$	-	$0$	-	$0$
							-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$
							+	$12 x^{5}$	-	$0$	-	$0$
									-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$
									+	$x^{4}$	-	$0$	-	$0$
											+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$

Step 5.18

Divide the highest order term in the dividend $18 x^{3}$ by the highest order term in divisor $x^{2}$ .

						$20 x^{4}$	-	$12 x^{3}$	-	$x^{2}$	+	$18 x$
$x^{2}$	+	$0 x$	+	$0$		$20 x^{6}$	-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$	-	$5$
					-	$20 x^{6}$	-	$0$	-	$0$
							-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$
							+	$12 x^{5}$	-	$0$	-	$0$
									-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$
									+	$x^{4}$	-	$0$	-	$0$
											+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$

Step 5.19

Multiply the new quotient term by the divisor.

						$20 x^{4}$	-	$12 x^{3}$	-	$x^{2}$	+	$18 x$
$x^{2}$	+	$0 x$	+	$0$		$20 x^{6}$	-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$	-	$5$
					-	$20 x^{6}$	-	$0$	-	$0$
							-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$
							+	$12 x^{5}$	-	$0$	-	$0$
									-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$
									+	$x^{4}$	-	$0$	-	$0$
											+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$
											+	$18 x^{3}$	+	$0$	+	$0$

Step 5.20

The expression needs to be subtracted from the dividend, so change all the signs in $18 x^{3} + 0 + 0$

						$20 x^{4}$	-	$12 x^{3}$	-	$x^{2}$	+	$18 x$
$x^{2}$	+	$0 x$	+	$0$		$20 x^{6}$	-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$	-	$5$
					-	$20 x^{6}$	-	$0$	-	$0$
							-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$
							+	$12 x^{5}$	-	$0$	-	$0$
									-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$
									+	$x^{4}$	-	$0$	-	$0$
											+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$
											-	$18 x^{3}$	-	$0$	-	$0$

Step 5.21

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

						$20 x^{4}$	-	$12 x^{3}$	-	$x^{2}$	+	$18 x$
$x^{2}$	+	$0 x$	+	$0$		$20 x^{6}$	-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$	-	$5$
					-	$20 x^{6}$	-	$0$	-	$0$
							-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$
							+	$12 x^{5}$	-	$0$	-	$0$
									-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$
									+	$x^{4}$	-	$0$	-	$0$
											+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$
											-	$18 x^{3}$	-	$0$	-	$0$
													-	$5 x^{2}$	+	$0$

Step 5.22

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

						$20 x^{4}$	-	$12 x^{3}$	-	$x^{2}$	+	$18 x$
$x^{2}$	+	$0 x$	+	$0$		$20 x^{6}$	-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$	-	$5$
					-	$20 x^{6}$	-	$0$	-	$0$
							-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$
							+	$12 x^{5}$	-	$0$	-	$0$
									-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$
									+	$x^{4}$	-	$0$	-	$0$
											+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$
											-	$18 x^{3}$	-	$0$	-	$0$
													-	$5 x^{2}$	+	$0$	-	$5$

Step 5.23

Divide the highest order term in the dividend $- 5 x^{2}$ by the highest order term in divisor $x^{2}$ .

						$20 x^{4}$	-	$12 x^{3}$	-	$x^{2}$	+	$18 x$	-	$5$
$x^{2}$	+	$0 x$	+	$0$		$20 x^{6}$	-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$	-	$5$
					-	$20 x^{6}$	-	$0$	-	$0$
							-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$
							+	$12 x^{5}$	-	$0$	-	$0$
									-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$
									+	$x^{4}$	-	$0$	-	$0$
											+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$
											-	$18 x^{3}$	-	$0$	-	$0$
													-	$5 x^{2}$	+	$0$	-	$5$

Step 5.24

Multiply the new quotient term by the divisor.

						$20 x^{4}$	-	$12 x^{3}$	-	$x^{2}$	+	$18 x$	-	$5$
$x^{2}$	+	$0 x$	+	$0$		$20 x^{6}$	-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$	-	$5$
					-	$20 x^{6}$	-	$0$	-	$0$
							-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$
							+	$12 x^{5}$	-	$0$	-	$0$
									-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$
									+	$x^{4}$	-	$0$	-	$0$
											+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$
											-	$18 x^{3}$	-	$0$	-	$0$
													-	$5 x^{2}$	+	$0$	-	$5$
													-	$5 x^{2}$	+	$0$	+	$0$

Step 5.25

The expression needs to be subtracted from the dividend, so change all the signs in $- 5 x^{2} + 0 + 0$

						$20 x^{4}$	-	$12 x^{3}$	-	$x^{2}$	+	$18 x$	-	$5$
$x^{2}$	+	$0 x$	+	$0$		$20 x^{6}$	-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$	-	$5$
					-	$20 x^{6}$	-	$0$	-	$0$
							-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$
							+	$12 x^{5}$	-	$0$	-	$0$
									-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$
									+	$x^{4}$	-	$0$	-	$0$
											+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$
											-	$18 x^{3}$	-	$0$	-	$0$
													-	$5 x^{2}$	+	$0$	-	$5$
													+	$5 x^{2}$	-	$0$	-	$0$

Step 5.26

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

						$20 x^{4}$	-	$12 x^{3}$	-	$x^{2}$	+	$18 x$	-	$5$
$x^{2}$	+	$0 x$	+	$0$		$20 x^{6}$	-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$	-	$5$
					-	$20 x^{6}$	-	$0$	-	$0$
							-	$12 x^{5}$	-	$x^{4}$	+	$18 x^{3}$
							+	$12 x^{5}$	-	$0$	-	$0$
									-	$x^{4}$	+	$18 x^{3}$	-	$5 x^{2}$
									+	$x^{4}$	-	$0$	-	$0$
											+	$18 x^{3}$	-	$5 x^{2}$	+	$0 x$
											-	$18 x^{3}$	-	$0$	-	$0$
													-	$5 x^{2}$	+	$0$	-	$5$
													+	$5 x^{2}$	-	$0$	-	$0$
																	-	$5$

Step 5.27

The final answer is the quotient plus the remainder over the divisor.

$20 x^{4} - 12 x^{3} - x^{2} + 18 x - 5 - \frac{5}{x^{2}}$

Step 5.28

The oblique asymptote is the polynomial portion of the long division result.

$y = 20 x^{4} - 12 x^{3} - x^{2} + 18 x - 5$

Step 6

This is the set of all asymptotes.

Vertical Asymptotes: $x = 0$

No Horizontal Asymptotes

Oblique Asymptotes: $y = 20 x^{4} - 12 x^{3} - x^{2} + 18 x - 5$

Step 7