Precalculus Examples

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

Step 1

Decompose the fraction and multiply through by the common denominator.

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Step 1.1

For each factor in the denominator, create a new fraction using the factor as the denominator, and an unknown value as the numerator. Since the factor is 2nd order, $2$ terms are required in the numerator. The number of terms required in the numerator is always equal to the order of the factor in the denominator.

$\frac{A}{x^{2}} + \frac{B}{x} + \frac{C x + D}{{(x^{2} + 6)}^{2}}$

Step 1.2

$\frac{A}{x^{2}} + \frac{B}{x} + \frac{C x + D}{{(x^{2} + 6)}^{2}} + \frac{F x + G}{x^{2} + 6}$

Step 1.3

Multiply each fraction in the equation by the denominator of the original expression. In this case, the denominator is $x^{2} {(x^{2} + 6)}^{2}$ .

$\frac{(x^{4} + x^{2} + 1) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} {(x^{2} + 6)}^{2}} = \frac{A (x^{2} {(x^{2} + 6)}^{2})}{x^{2}} + \frac{B (x^{2} {(x^{2} + 6)}^{2})}{x} + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.4

Cancel the common factor of $x^{2}$ .

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Step 1.4.1

Cancel the common factor.

Step 1.4.2

Rewrite the expression.

$\frac{(x^{4} + x^{2} + 1) ({(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} = \frac{A (x^{2} {(x^{2} + 6)}^{2})}{x^{2}} + \frac{B (x^{2} {(x^{2} + 6)}^{2})}{x} + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.5

Cancel the common factor of ${(x^{2} + 6)}^{2}$ .

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Step 1.5.1

Cancel the common factor.

$\frac{(x^{4} + x^{2} + 1) {(x^{2} + 6)}^{2}}{{(x^{2} + 6)}^{2}} = \frac{A (x^{2} {(x^{2} + 6)}^{2})}{x^{2}} + \frac{B (x^{2} {(x^{2} + 6)}^{2})}{x} + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.5.2

Divide $x^{4} + x^{2} + 1$ by $1$ .

$x^{4} + x^{2} + 1 = \frac{A (x^{2} {(x^{2} + 6)}^{2})}{x^{2}} + \frac{B (x^{2} {(x^{2} + 6)}^{2})}{x} + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6

Simplify each term.

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Step 1.6.1

Cancel the common factor of $x^{2}$ .

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Step 1.6.1.1

Cancel the common factor.

Step 1.6.1.2

Divide $A ({(x^{2} + 6)}^{2})$ by $1$ .

$x^{4} + x^{2} + 1 = A ({(x^{2} + 6)}^{2}) + \frac{B (x^{2} {(x^{2} + 6)}^{2})}{x} + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.2

Rewrite ${(x^{2} + 6)}^{2}$ as $(x^{2} + 6) (x^{2} + 6)$ .

$x^{4} + x^{2} + 1 = A ((x^{2} + 6) (x^{2} + 6)) + \frac{B (x^{2} {(x^{2} + 6)}^{2})}{x} + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.3

Expand $(x^{2} + 6) (x^{2} + 6)$ using the FOIL Method.

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Step 1.6.3.1

Apply the distributive property.

$x^{4} + x^{2} + 1 = A (x^{2} (x^{2} + 6) + 6 (x^{2} + 6)) + \frac{B (x^{2} {(x^{2} + 6)}^{2})}{x} + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.3.2

Apply the distributive property.

$x^{4} + x^{2} + 1 = A (x^{2} x^{2} + x^{2} \cdot 6 + 6 (x^{2} + 6)) + \frac{B (x^{2} {(x^{2} + 6)}^{2})}{x} + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.3.3

Apply the distributive property.

$x^{4} + x^{2} + 1 = A (x^{2} x^{2} + x^{2} \cdot 6 + 6 x^{2} + 6 \cdot 6) + \frac{B (x^{2} {(x^{2} + 6)}^{2})}{x} + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.4

Simplify and combine like terms.

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Step 1.6.4.1

Simplify each term.

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Step 1.6.4.1.1

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

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Step 1.6.4.1.1.1

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

$x^{4} + x^{2} + 1 = A (x^{2 + 2} + x^{2} \cdot 6 + 6 x^{2} + 6 \cdot 6) + \frac{B (x^{2} {(x^{2} + 6)}^{2})}{x} + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.4.1.1.2

Add $2$ and $2$ .

$x^{4} + x^{2} + 1 = A (x^{4} + x^{2} \cdot 6 + 6 x^{2} + 6 \cdot 6) + \frac{B (x^{2} {(x^{2} + 6)}^{2})}{x} + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.4.1.2

Move $6$ to the left of $x^{2}$ .

$x^{4} + x^{2} + 1 = A (x^{4} + 6 \cdot x^{2} + 6 x^{2} + 6 \cdot 6) + \frac{B (x^{2} {(x^{2} + 6)}^{2})}{x} + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.4.1.3

Multiply $6$ by $6$ .

$x^{4} + x^{2} + 1 = A (x^{4} + 6 x^{2} + 6 x^{2} + 36) + \frac{B (x^{2} {(x^{2} + 6)}^{2})}{x} + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.4.2

Add $6 x^{2}$ and $6 x^{2}$ .

$x^{4} + x^{2} + 1 = A (x^{4} + 12 x^{2} + 36) + \frac{B (x^{2} {(x^{2} + 6)}^{2})}{x} + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.5

Apply the distributive property.

$x^{4} + x^{2} + 1 = A x^{4} + A (12 x^{2}) + A \cdot 36 + \frac{B (x^{2} {(x^{2} + 6)}^{2})}{x} + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.6

Simplify.

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Step 1.6.6.1

Rewrite using the commutative property of multiplication.

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + A \cdot 36 + \frac{B (x^{2} {(x^{2} + 6)}^{2})}{x} + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.6.2

Move $36$ to the left of $A$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 \cdot A + \frac{B (x^{2} {(x^{2} + 6)}^{2})}{x} + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.7

Cancel the common factor of $x^{2}$ and $x$ .

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Step 1.6.7.1

Factor $x$ out of $B (x^{2} {(x^{2} + 6)}^{2})$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + \frac{x (B (x {(x^{2} + 6)}^{2}))}{x} + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.7.2

Cancel the common factors.

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Step 1.6.7.2.1

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

Step 1.6.7.2.2

Factor $x$ out of $x^{1}$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + \frac{x (B (x {(x^{2} + 6)}^{2}))}{x \cdot 1} + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.7.2.3

Cancel the common factor.

Step 1.6.7.2.4

Rewrite the expression.

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + \frac{B (x {(x^{2} + 6)}^{2})}{1} + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.7.2.5

Divide $B (x {(x^{2} + 6)}^{2})$ by $1$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B (x {(x^{2} + 6)}^{2}) + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.8

Rewrite ${(x^{2} + 6)}^{2}$ as $(x^{2} + 6) (x^{2} + 6)$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B (x ((x^{2} + 6) (x^{2} + 6))) + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.9

Expand $(x^{2} + 6) (x^{2} + 6)$ using the FOIL Method.

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Step 1.6.9.1

Apply the distributive property.

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B (x (x^{2} (x^{2} + 6) + 6 (x^{2} + 6))) + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.9.2

Apply the distributive property.

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B (x (x^{2} x^{2} + x^{2} \cdot 6 + 6 (x^{2} + 6))) + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.9.3

Apply the distributive property.

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B (x (x^{2} x^{2} + x^{2} \cdot 6 + 6 x^{2} + 6 \cdot 6)) + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.10

Simplify and combine like terms.

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Step 1.6.10.1

Simplify each term.

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Step 1.6.10.1.1

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

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Step 1.6.10.1.1.1

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

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B (x (x^{2 + 2} + x^{2} \cdot 6 + 6 x^{2} + 6 \cdot 6)) + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.10.1.1.2

Add $2$ and $2$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B (x (x^{4} + x^{2} \cdot 6 + 6 x^{2} + 6 \cdot 6)) + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.10.1.2

Move $6$ to the left of $x^{2}$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B (x (x^{4} + 6 \cdot x^{2} + 6 x^{2} + 6 \cdot 6)) + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.10.1.3

Multiply $6$ by $6$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B (x (x^{4} + 6 x^{2} + 6 x^{2} + 36)) + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.10.2

Add $6 x^{2}$ and $6 x^{2}$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B (x (x^{4} + 12 x^{2} + 36)) + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.11

Apply the distributive property.

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B (x \cdot x^{4} + x (12 x^{2}) + x \cdot 36) + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.12

Simplify.

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Step 1.6.12.1

Multiply $x$ by $x^{4}$ by adding the exponents.

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Step 1.6.12.1.1

Multiply $x$ by $x^{4}$ .

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Step 1.6.12.1.1.1

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

Step 1.6.12.1.1.2

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

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B (x^{1 + 4} + x (12 x^{2}) + x \cdot 36) + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.12.1.2

Add $1$ and $4$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B (x^{5} + x (12 x^{2}) + x \cdot 36) + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.12.2

Rewrite using the commutative property of multiplication.

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B (x^{5} + 12 x \cdot x^{2} + x \cdot 36) + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.12.3

Move $36$ to the left of $x$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B (x^{5} + 12 x \cdot x^{2} + 36 \cdot x) + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.13

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

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Step 1.6.13.1

Move $x^{2}$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B (x^{5} + 12 (x^{2} x) + 36 \cdot x) + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.13.2

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

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Step 1.6.13.2.1

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

Step 1.6.13.2.2

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

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B (x^{5} + 12 x^{2 + 1} + 36 \cdot x) + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.13.3

Add $2$ and $1$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B (x^{5} + 12 x^{3} + 36 \cdot x) + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B (x^{5} + 12 x^{3} + 36 x) + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.14

Apply the distributive property.

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + B (12 x^{3}) + B (36 x) + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.15

Simplify.

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Step 1.6.15.1

Rewrite using the commutative property of multiplication.

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + B (36 x) + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.15.2

Rewrite using the commutative property of multiplication.

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + \frac{(C x + D) (x^{2} {(x^{2} + 6)}^{2})}{{(x^{2} + 6)}^{2}} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.16

Cancel the common factor of ${(x^{2} + 6)}^{2}$ .

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Step 1.6.16.1

Cancel the common factor.

Step 1.6.16.2

Divide $(C x + D) (x^{2})$ by $1$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + (C x + D) (x^{2}) + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.17

Apply the distributive property.

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x \cdot x^{2} + D x^{2} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.18

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

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Step 1.6.18.1

Move $x^{2}$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C (x^{2} x) + D x^{2} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.18.2

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

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Step 1.6.18.2.1

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

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C (x^{2} x) + D x^{2} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.18.2.2

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

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{2 + 1} + D x^{2} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.18.3

Add $2$ and $1$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + \frac{(F x + G) (x^{2} {(x^{2} + 6)}^{2})}{x^{2} + 6}$

Step 1.6.19

Cancel the common factor of ${(x^{2} + 6)}^{2}$ and $x^{2} + 6$ .

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Step 1.6.19.1

Factor $x^{2} + 6$ out of $(F x + G) (x^{2} {(x^{2} + 6)}^{2})$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + \frac{(x^{2} + 6) ((F x + G) (x^{2} (x^{2} + 6)))}{x^{2} + 6}$

Step 1.6.19.2

Cancel the common factors.

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Step 1.6.19.2.1

Multiply by $1$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + \frac{(x^{2} + 6) ((F x + G) (x^{2} (x^{2} + 6)))}{(x^{2} + 6) \cdot 1}$

Step 1.6.19.2.2

Cancel the common factor.

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + \frac{(x^{2} + 6) ((F x + G) (x^{2} (x^{2} + 6)))}{(x^{2} + 6) \cdot 1}$

Step 1.6.19.2.3

Rewrite the expression.

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + \frac{(F x + G) (x^{2} (x^{2} + 6))}{1}$

Step 1.6.19.2.4

Divide $(F x + G) (x^{2} (x^{2} + 6))$ by $1$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + (F x + G) (x^{2} (x^{2} + 6))$

Step 1.6.20

Apply the distributive property.

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + (F x + G) (x^{2} x^{2} + x^{2} \cdot 6)$

Step 1.6.21

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

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Step 1.6.21.1

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

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + (F x + G) (x^{2 + 2} + x^{2} \cdot 6)$

Step 1.6.21.2

Add $2$ and $2$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + (F x + G) (x^{4} + x^{2} \cdot 6)$

Step 1.6.22

Move $6$ to the left of $x^{2}$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + (F x + G) (x^{4} + 6 \cdot x^{2})$

Step 1.6.23

Expand $(F x + G) (x^{4} + 6 x^{2})$ using the FOIL Method.

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Step 1.6.23.1

Apply the distributive property.

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + F x (x^{4} + 6 x^{2}) + G (x^{4} + 6 x^{2})$

Step 1.6.23.2

Apply the distributive property.

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + F x \cdot x^{4} + F x (6 x^{2}) + G (x^{4} + 6 x^{2})$

Step 1.6.23.3

Apply the distributive property.

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + F x \cdot x^{4} + F x (6 x^{2}) + G x^{4} + G (6 x^{2})$

Step 1.6.24

Simplify each term.

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Step 1.6.24.1

Multiply $x$ by $x^{4}$ by adding the exponents.

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Step 1.6.24.1.1

Move $x^{4}$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + F (x^{4} x) + F x (6 x^{2}) + G x^{4} + G (6 x^{2})$

Step 1.6.24.1.2

Multiply $x^{4}$ by $x$ .

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Step 1.6.24.1.2.1

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

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + F (x^{4} x) + F x (6 x^{2}) + G x^{4} + G (6 x^{2})$

Step 1.6.24.1.2.2

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

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + F x^{4 + 1} + F x (6 x^{2}) + G x^{4} + G (6 x^{2})$

Step 1.6.24.1.3

Add $4$ and $1$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + F x^{5} + F x (6 x^{2}) + G x^{4} + G (6 x^{2})$

Step 1.6.24.2

Rewrite using the commutative property of multiplication.

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + F x^{5} + 6 F x \cdot x^{2} + G x^{4} + G (6 x^{2})$

Step 1.6.24.3

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

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Step 1.6.24.3.1

Move $x^{2}$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + F x^{5} + 6 F (x^{2} x) + G x^{4} + G (6 x^{2})$

Step 1.6.24.3.2

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

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Step 1.6.24.3.2.1

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

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + F x^{5} + 6 F (x^{2} x) + G x^{4} + G (6 x^{2})$

Step 1.6.24.3.2.2

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

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + F x^{5} + 6 F x^{2 + 1} + G x^{4} + G (6 x^{2})$

Step 1.6.24.3.3

Add $2$ and $1$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + F x^{5} + 6 F x^{3} + G x^{4} + G (6 x^{2})$

Step 1.6.24.4

Rewrite using the commutative property of multiplication.

$x^{4} + x^{2} + 1 = A x^{4} + 12 A x^{2} + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + F x^{5} + 6 F x^{3} + G x^{4} + 6 G x^{2}$

Step 1.7

Simplify the expression.

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Step 1.7.1

Move $A$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 x^{2} A + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + F x^{5} + 6 F x^{3} + G x^{4} + 6 G x^{2}$

Step 1.7.2

Reorder $B$ and $x^{5}$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 x^{2} A + 36 A + B x^{5} + 12 B x^{3} + 36 B x + C x^{3} + D x^{2} + F x^{5} + 6 F x^{3} + G x^{4} + 6 G x^{2}$

Step 1.7.3

Move $B$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 x^{2} A + 36 A + B x^{5} + 12 x^{3} B + 36 B x + C x^{3} + D x^{2} + F x^{5} + 6 F x^{3} + G x^{4} + 6 G x^{2}$

Step 1.7.4

Move $B$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 x^{2} A + 36 A + B x^{5} + 12 x^{3} B + 36 x B + C x^{3} + D x^{2} + F x^{5} + 6 F x^{3} + G x^{4} + 6 G x^{2}$

Step 1.7.5

Reorder $F$ and $x^{5}$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 x^{2} A + 36 A + B x^{5} + 12 x^{3} B + 36 x B + C x^{3} + D x^{2} + F x^{5} + 6 F x^{3} + G x^{4} + 6 G x^{2}$

Step 1.7.6

Move $F$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 x^{2} A + 36 A + B x^{5} + 12 x^{3} B + 36 x B + C x^{3} + D x^{2} + F x^{5} + 6 x^{3} F + G x^{4} + 6 G x^{2}$

Step 1.7.7

Reorder $G$ and $x^{4}$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 x^{2} A + 36 A + B x^{5} + 12 x^{3} B + 36 x B + C x^{3} + D x^{2} + F x^{5} + 6 x^{3} F + G x^{4} + 6 G x^{2}$

Step 1.7.8

Move $G$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 x^{2} A + 36 A + B x^{5} + 12 x^{3} B + 36 x B + C x^{3} + D x^{2} + F x^{5} + 6 x^{3} F + G x^{4} + 6 x^{2} G$

Step 1.7.9

Move $36 A$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 x^{2} A + B x^{5} + 12 x^{3} B + 36 x B + C x^{3} + D x^{2} + F x^{5} + 6 x^{3} F + G x^{4} + 6 x^{2} G + 36 A$

Step 1.7.10

Move $36 x B$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 x^{2} A + B x^{5} + 12 x^{3} B + C x^{3} + D x^{2} + F x^{5} + 6 x^{3} F + G x^{4} + 6 x^{2} G + 36 x B + 36 A$

Step 1.7.11

Move $D x^{2}$ .

$x^{4} + x^{2} + 1 = A x^{4} + 12 x^{2} A + B x^{5} + 12 x^{3} B + C x^{3} + F x^{5} + 6 x^{3} F + G x^{4} + D x^{2} + 6 x^{2} G + 36 x B + 36 A$

Step 1.7.12

Move $12 x^{2} A$ .

$x^{4} + x^{2} + 1 = A x^{4} + B x^{5} + 12 x^{3} B + C x^{3} + F x^{5} + 6 x^{3} F + G x^{4} + 12 x^{2} A + D x^{2} + 6 x^{2} G + 36 x B + 36 A$

Step 1.7.13

Move $6 x^{3} F$ .

$x^{4} + x^{2} + 1 = A x^{4} + B x^{5} + 12 x^{3} B + C x^{3} + F x^{5} + G x^{4} + 6 x^{3} F + 12 x^{2} A + D x^{2} + 6 x^{2} G + 36 x B + 36 A$

Step 1.7.14

Move $C x^{3}$ .

$x^{4} + x^{2} + 1 = A x^{4} + B x^{5} + 12 x^{3} B + F x^{5} + G x^{4} + C x^{3} + 6 x^{3} F + 12 x^{2} A + D x^{2} + 6 x^{2} G + 36 x B + 36 A$

Step 1.7.15

Move $12 x^{3} B$ .

$x^{4} + x^{2} + 1 = A x^{4} + B x^{5} + F x^{5} + G x^{4} + 12 x^{3} B + C x^{3} + 6 x^{3} F + 12 x^{2} A + D x^{2} + 6 x^{2} G + 36 x B + 36 A$

Step 1.7.16

Move $A x^{4}$ .

$x^{4} + x^{2} + 1 = B x^{5} + F x^{5} + A x^{4} + G x^{4} + 12 x^{3} B + C x^{3} + 6 x^{3} F + 12 x^{2} A + D x^{2} + 6 x^{2} G + 36 x B + 36 A$

Step 2

Create equations for the partial fraction variables and use them to set up a system of equations.

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Step 2.1

Create an equation for the partial fraction variables by equating the coefficients of $x^{5}$ from each side of the equation. For the equation to be equal, the equivalent coefficients on each side of the equation must be equal.

$0 = B + F$

Step 2.2

Create an equation for the partial fraction variables by equating the coefficients of $x^{4}$ from each side of the equation. For the equation to be equal, the equivalent coefficients on each side of the equation must be equal.

$1 = A + G$

Step 2.3

Create an equation for the partial fraction variables by equating the coefficients of $x^{3}$ from each side of the equation. For the equation to be equal, the equivalent coefficients on each side of the equation must be equal.

$0 = 12 B + C + 6 F$

Step 2.4

Create an equation for the partial fraction variables by equating the coefficients of $x^{2}$ from each side of the equation. For the equation to be equal, the equivalent coefficients on each side of the equation must be equal.

$1 = 12 A + D + 6 G$

Step 2.5

Create an equation for the partial fraction variables by equating the coefficients of $x$ from each side of the equation. For the equation to be equal, the equivalent coefficients on each side of the equation must be equal.

$0 = 36 B$

Step 2.6

Create an equation for the partial fraction variables by equating the coefficients of the terms not containing $x$ . For the equation to be equal, the equivalent coefficients on each side of the equation must be equal.

$1 = 36 A$

Step 2.7

Set up the system of equations to find the coefficients of the partial fractions.

$0 = B + F$

$1 = A + G$

$0 = 12 B + C + 6 F$

$1 = 12 A + D + 6 G$

$0 = 36 B$

$1 = 36 A$

$0 = B + F$

$1 = A + G$

$0 = 12 B + C + 6 F$

$1 = 12 A + D + 6 G$

$0 = 36 B$

$1 = 36 A$

Step 3

Solve the system of equations.

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Step 3.1

Solve for $B$ in $0 = 36 B$ .

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Step 3.1.1

Rewrite the equation as $36 B = 0$ .

$36 B = 0$

$0 = B + F$

$1 = A + G$

$0 = 12 B + C + 6 F$

$1 = 12 A + D + 6 G$

$1 = 36 A$

Step 3.1.2

Divide each term in $36 B = 0$ by $36$ and simplify.

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Step 3.1.2.1

Divide each term in $36 B = 0$ by $36$ .

$\frac{36 B}{36} = \frac{0}{36}$

$0 = B + F$

$1 = A + G$

$0 = 12 B + C + 6 F$

$1 = 12 A + D + 6 G$

$1 = 36 A$

Step 3.1.2.2

Simplify the left side.

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Step 3.1.2.2.1

Cancel the common factor of $36$ .

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Step 3.1.2.2.1.1

Cancel the common factor.

$\frac{36 B}{36} = \frac{0}{36}$

$0 = B + F$

$1 = A + G$

$0 = 12 B + C + 6 F$

$1 = 12 A + D + 6 G$

$1 = 36 A$

Step 3.1.2.2.1.2

Divide $B$ by $1$ .

$B = \frac{0}{36}$

$0 = B + F$

$1 = A + G$

$0 = 12 B + C + 6 F$

$1 = 12 A + D + 6 G$

$1 = 36 A$

$B = \frac{0}{36}$

$0 = B + F$

$1 = A + G$

$0 = 12 B + C + 6 F$

$1 = 12 A + D + 6 G$

$1 = 36 A$

$B = \frac{0}{36}$

$0 = B + F$

$1 = A + G$

$0 = 12 B + C + 6 F$

$1 = 12 A + D + 6 G$

$1 = 36 A$

Step 3.1.2.3

Simplify the right side.

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Step 3.1.2.3.1

Divide $0$ by $36$ .

$B = 0$

$0 = B + F$

$1 = A + G$

$0 = 12 B + C + 6 F$

$1 = 12 A + D + 6 G$

$1 = 36 A$

$B = 0$

$0 = B + F$

$1 = A + G$

$0 = 12 B + C + 6 F$

$1 = 12 A + D + 6 G$

$1 = 36 A$

$B = 0$

$0 = B + F$

$1 = A + G$

$0 = 12 B + C + 6 F$

$1 = 12 A + D + 6 G$

$1 = 36 A$

$B = 0$

$0 = B + F$

$1 = A + G$

$0 = 12 B + C + 6 F$

$1 = 12 A + D + 6 G$

$1 = 36 A$

Step 3.2

Replace all occurrences of $B$ with $0$ in each equation.

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Step 3.2.1

Replace all occurrences of $B$ in $0 = B + F$ with $0$ .

$0 = (0) + F$

$B = 0$

$1 = A + G$

$0 = 12 B + C + 6 F$

$1 = 12 A + D + 6 G$

$1 = 36 A$

Step 3.2.2

Simplify the right side.

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Step 3.2.2.1

Add $0$ and $F$ .

$0 = F$

$B = 0$

$1 = A + G$

$0 = 12 B + C + 6 F$

$1 = 12 A + D + 6 G$

$1 = 36 A$

$0 = F$

$B = 0$

$1 = A + G$

$0 = 12 B + C + 6 F$

$1 = 12 A + D + 6 G$

$1 = 36 A$

Step 3.2.3

Replace all occurrences of $B$ in $0 = 12 B + C + 6 F$ with $0$ .

$0 = 12 (0) + C + 6 F$

$0 = F$

$B = 0$

$1 = A + G$

$1 = 12 A + D + 6 G$

$1 = 36 A$

Step 3.2.4

Simplify the right side.

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Step 3.2.4.1

Simplify $12 (0) + C + 6 F$ .

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Step 3.2.4.1.1

Multiply $12$ by $0$ .

$0 = 0 + C + 6 F$

$0 = F$

$B = 0$

$1 = A + G$

$1 = 12 A + D + 6 G$

$1 = 36 A$

Step 3.2.4.1.2

Add $0$ and $C$ .

$0 = C + 6 F$

$0 = F$

$B = 0$

$1 = A + G$

$1 = 12 A + D + 6 G$

$1 = 36 A$

$0 = C + 6 F$

$0 = F$

$B = 0$

$1 = A + G$

$1 = 12 A + D + 6 G$

$1 = 36 A$

$0 = C + 6 F$

$0 = F$

$B = 0$

$1 = A + G$

$1 = 12 A + D + 6 G$

$1 = 36 A$

Step 3.2.5

Rewrite the equation as $36 A = 1$ .

$36 A = 1$

$0 = C + 6 F$

$0 = F$

$B = 0$

$1 = A + G$

$1 = 12 A + D + 6 G$

Step 3.2.6

Divide each term in $36 A = 1$ by $36$ and simplify.

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Step 3.2.6.1

Divide each term in $36 A = 1$ by $36$ .

$\frac{36 A}{36} = \frac{1}{36}$

$0 = C + 6 F$

$0 = F$

$B = 0$

$1 = A + G$

$1 = 12 A + D + 6 G$

Step 3.2.6.2

Simplify the left side.

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Step 3.2.6.2.1

Cancel the common factor of $36$ .

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Step 3.2.6.2.1.1

Cancel the common factor.

$\frac{36 A}{36} = \frac{1}{36}$

$0 = C + 6 F$

$0 = F$

$B = 0$

$1 = A + G$

$1 = 12 A + D + 6 G$

Step 3.2.6.2.1.2

Divide $A$ by $1$ .

$A = \frac{1}{36}$

$0 = C + 6 F$

$0 = F$

$B = 0$

$1 = A + G$

$1 = 12 A + D + 6 G$

$A = \frac{1}{36}$

$0 = C + 6 F$

$0 = F$

$B = 0$

$1 = A + G$

$1 = 12 A + D + 6 G$

$A = \frac{1}{36}$

$0 = C + 6 F$

$0 = F$

$B = 0$

$1 = A + G$

$1 = 12 A + D + 6 G$

$A = \frac{1}{36}$

$0 = C + 6 F$

$0 = F$

$B = 0$

$1 = A + G$

$1 = 12 A + D + 6 G$

$A = \frac{1}{36}$

$0 = C + 6 F$

$0 = F$

$B = 0$

$1 = A + G$

$1 = 12 A + D + 6 G$

Step 3.3

Replace all occurrences of $A$ with $\frac{1}{36}$ in each equation.

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Step 3.3.1

Rewrite the equation as $F = 0$ .

$F = 0$

$A = \frac{1}{36}$

$0 = C + 6 F$

$B = 0$

$1 = A + G$

$1 = 12 A + D + 6 G$

Step 3.3.2

Replace all occurrences of $A$ in $1 = A + G$ with $\frac{1}{36}$ .

$1 = (\frac{1}{36}) + G$

$F = 0$

$A = \frac{1}{36}$

$0 = C + 6 F$

$B = 0$

$1 = 12 A + D + 6 G$

Step 3.3.3

Simplify the right side.

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Step 3.3.3.1

Remove parentheses.

$1 = \frac{1}{36} + G$

$F = 0$

$A = \frac{1}{36}$

$0 = C + 6 F$

$B = 0$

$1 = 12 A + D + 6 G$

$1 = \frac{1}{36} + G$

$F = 0$

$A = \frac{1}{36}$

$0 = C + 6 F$

$B = 0$

$1 = 12 A + D + 6 G$

Step 3.3.4

Replace all occurrences of $A$ in $1 = 12 A + D + 6 G$ with $\frac{1}{36}$ .

$1 = 12 (\frac{1}{36}) + D + 6 G$

$1 = \frac{1}{36} + G$

$F = 0$

$A = \frac{1}{36}$

$0 = C + 6 F$

$B = 0$

Step 3.3.5

Simplify the right side.

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Step 3.3.5.1

Cancel the common factor of $12$ .

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Step 3.3.5.1.1

Factor $12$ out of $36$ .

$1 = 12 (\frac{1}{12 (3)}) + D + 6 G$

$1 = \frac{1}{36} + G$

$F = 0$

$A = \frac{1}{36}$

$0 = C + 6 F$

$B = 0$

Step 3.3.5.1.2

Cancel the common factor.

$1 = 12 (\frac{1}{12 \cdot 3}) + D + 6 G$

$1 = \frac{1}{36} + G$

$F = 0$

$A = \frac{1}{36}$

$0 = C + 6 F$

$B = 0$

Step 3.3.5.1.3

Rewrite the expression.

$1 = \frac{1}{3} + D + 6 G$

$1 = \frac{1}{36} + G$

$F = 0$

$A = \frac{1}{36}$

$0 = C + 6 F$

$B = 0$

$1 = \frac{1}{3} + D + 6 G$

$1 = \frac{1}{36} + G$

$F = 0$

$A = \frac{1}{36}$

$0 = C + 6 F$

$B = 0$

$1 = \frac{1}{3} + D + 6 G$

$1 = \frac{1}{36} + G$

$F = 0$

$A = \frac{1}{36}$

$0 = C + 6 F$

$B = 0$

$1 = \frac{1}{3} + D + 6 G$

$1 = \frac{1}{36} + G$

$F = 0$

$A = \frac{1}{36}$

$0 = C + 6 F$

$B = 0$

Step 3.4

Replace all occurrences of $F$ with $0$ in each equation.

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Step 3.4.1

Rewrite the equation as $\frac{1}{36} + G = 1$ .

$\frac{1}{36} + G = 1$

$1 = \frac{1}{3} + D + 6 G$

$F = 0$

$A = \frac{1}{36}$

$0 = C + 6 F$

$B = 0$

Step 3.4.2

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

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Step 3.4.2.1

Subtract $\frac{1}{36}$ from both sides of the equation.

$G = 1 - \frac{1}{36}$

$1 = \frac{1}{3} + D + 6 G$

$F = 0$

$A = \frac{1}{36}$

$0 = C + 6 F$

$B = 0$

Step 3.4.2.2

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

$G = \frac{36}{36} - \frac{1}{36}$

$1 = \frac{1}{3} + D + 6 G$

$F = 0$

$A = \frac{1}{36}$

$0 = C + 6 F$

$B = 0$

Step 3.4.2.3

Combine the numerators over the common denominator.

$G = \frac{36 - 1}{36}$

$1 = \frac{1}{3} + D + 6 G$

$F = 0$

$A = \frac{1}{36}$

$0 = C + 6 F$

$B = 0$

Step 3.4.2.4

Subtract $1$ from $36$ .

$G = \frac{35}{36}$

$1 = \frac{1}{3} + D + 6 G$

$F = 0$

$A = \frac{1}{36}$

$0 = C + 6 F$

$B = 0$

$G = \frac{35}{36}$

$1 = \frac{1}{3} + D + 6 G$

$F = 0$

$A = \frac{1}{36}$

$0 = C + 6 F$

$B = 0$

Step 3.4.3

Replace all occurrences of $F$ in $0 = C + 6 F$ with $0$ .

$0 = C + 6 (0)$

$G = \frac{35}{36}$

$1 = \frac{1}{3} + D + 6 G$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

Step 3.4.4

Simplify the right side.

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Step 3.4.4.1

Simplify $C + 6 (0)$ .

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Step 3.4.4.1.1

Multiply $6$ by $0$ .

$0 = C + 0$

$G = \frac{35}{36}$

$1 = \frac{1}{3} + D + 6 G$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

Step 3.4.4.1.2

Add $C$ and $0$ .

$0 = C$

$G = \frac{35}{36}$

$1 = \frac{1}{3} + D + 6 G$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

$0 = C$

$G = \frac{35}{36}$

$1 = \frac{1}{3} + D + 6 G$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

$0 = C$

$G = \frac{35}{36}$

$1 = \frac{1}{3} + D + 6 G$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

$0 = C$

$G = \frac{35}{36}$

$1 = \frac{1}{3} + D + 6 G$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

Step 3.5

Replace all occurrences of $G$ with $\frac{35}{36}$ in each equation.

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Step 3.5.1

Rewrite the equation as $C = 0$ .

$C = 0$

$G = \frac{35}{36}$

$1 = \frac{1}{3} + D + 6 G$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

Step 3.5.2

Replace all occurrences of $G$ in $1 = \frac{1}{3} + D + 6 G$ with $\frac{35}{36}$ .

$1 = \frac{1}{3} + D + 6 (\frac{35}{36})$

$C = 0$

$G = \frac{35}{36}$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

Step 3.5.3

Simplify the right side.

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Step 3.5.3.1

Simplify $\frac{1}{3} + D + 6 (\frac{35}{36})$ .

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Step 3.5.3.1.1

Cancel the common factor of $6$ .

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Step 3.5.3.1.1.1

Factor $6$ out of $36$ .

$1 = \frac{1}{3} + D + 6 (\frac{35}{6 (6)})$

$C = 0$

$G = \frac{35}{36}$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

Step 3.5.3.1.1.2

Cancel the common factor.

$1 = \frac{1}{3} + D + 6 (\frac{35}{6 \cdot 6})$

$C = 0$

$G = \frac{35}{36}$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

Step 3.5.3.1.1.3

Rewrite the expression.

$1 = \frac{1}{3} + D + \frac{35}{6}$

$C = 0$

$G = \frac{35}{36}$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

$1 = \frac{1}{3} + D + \frac{35}{6}$

$C = 0$

$G = \frac{35}{36}$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

Step 3.5.3.1.2

To write $\frac{1}{3}$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$1 = D + \frac{1}{3} \cdot \frac{2}{2} + \frac{35}{6}$

$C = 0$

$G = \frac{35}{36}$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

Step 3.5.3.1.3

Write each expression with a common denominator of $6$ , by multiplying each by an appropriate factor of $1$ .

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Step 3.5.3.1.3.1

Multiply $\frac{1}{3}$ by $\frac{2}{2}$ .

$1 = D + \frac{2}{3 \cdot 2} + \frac{35}{6}$

$C = 0$

$G = \frac{35}{36}$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

Step 3.5.3.1.3.2

Multiply $3$ by $2$ .

$1 = D + \frac{2}{6} + \frac{35}{6}$

$C = 0$

$G = \frac{35}{36}$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

$1 = D + \frac{2}{6} + \frac{35}{6}$

$C = 0$

$G = \frac{35}{36}$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

Step 3.5.3.1.4

Combine the numerators over the common denominator.

$1 = D + \frac{2 + 35}{6}$

$C = 0$

$G = \frac{35}{36}$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

Step 3.5.3.1.5

Add $2$ and $35$ .

$1 = D + \frac{37}{6}$

$C = 0$

$G = \frac{35}{36}$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

$1 = D + \frac{37}{6}$

$C = 0$

$G = \frac{35}{36}$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

$1 = D + \frac{37}{6}$

$C = 0$

$G = \frac{35}{36}$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

$1 = D + \frac{37}{6}$

$C = 0$

$G = \frac{35}{36}$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

Step 3.6

Solve for $D$ in $1 = D + \frac{37}{6}$ .

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Step 3.6.1

Rewrite the equation as $D + \frac{37}{6} = 1$ .

$D + \frac{37}{6} = 1$

$C = 0$

$G = \frac{35}{36}$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

Step 3.6.2

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

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Step 3.6.2.1

Subtract $\frac{37}{6}$ from both sides of the equation.

$D = 1 - \frac{37}{6}$

$C = 0$

$G = \frac{35}{36}$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

Step 3.6.2.2

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

$D = \frac{6}{6} - \frac{37}{6}$

$C = 0$

$G = \frac{35}{36}$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

Step 3.6.2.3

Combine the numerators over the common denominator.

$D = \frac{6 - 37}{6}$

$C = 0$

$G = \frac{35}{36}$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

Step 3.6.2.4

Subtract $37$ from $6$ .

$D = \frac{- 31}{6}$

$C = 0$

$G = \frac{35}{36}$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

Step 3.6.2.5

Move the negative in front of the fraction.

$D = - \frac{31}{6}$

$C = 0$

$G = \frac{35}{36}$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

$D = - \frac{31}{6}$

$C = 0$

$G = \frac{35}{36}$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

$D = - \frac{31}{6}$

$C = 0$

$G = \frac{35}{36}$

$F = 0$

$A = \frac{1}{36}$

$B = 0$

Step 3.7

Solve the system of equations.

$D = - \frac{31}{6} C = 0 G = \frac{35}{36} F = 0 A = \frac{1}{36} B = 0$

Step 3.8

List all of the solutions.

$D = - \frac{31}{6}, C = 0, G = \frac{35}{36}, F = 0, A = \frac{1}{36}, B = 0$

Step 4

Replace each of the partial fraction coefficients in $\frac{A}{x^{2}} + \frac{B}{x} + \frac{C x + D}{{(x^{2} + 6)}^{2}} + \frac{F x + G}{x^{2} + 6}$ with the values found for $A$ , $B$ , $C$ , $D$ , $F$ , and $G$ .

$\frac{\frac{1}{36}}{x^{2}} + \frac{0}{x} + \frac{0 x - \frac{31}{6}}{{(x^{2} + 6)}^{2}} + \frac{0 x + \frac{35}{36}}{x^{2} + 6}$

Step 5

Simplify.

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Step 5.1

Multiply $0$ by $x$ .

$\frac{\frac{1}{36}}{x^{2}} + \frac{0}{x} + \frac{0 - \frac{31}{6}}{{(x^{2} + 6)}^{2}} + \frac{(0) \cdot x + \frac{35}{36}}{x^{2} + 6}$

Step 5.2

Subtract $\frac{31}{6}$ from $0$ .

$\frac{\frac{1}{36}}{x^{2}} + \frac{0}{x} + \frac{- \frac{31}{6}}{{(x^{2} + 6)}^{2}} + \frac{(0) \cdot x + \frac{35}{36}}{x^{2} + 6}$

Step 5.3

Multiply $0$ by $x$ .

$\frac{\frac{1}{36}}{x^{2}} + \frac{0}{x} + \frac{- \frac{31}{6}}{{(x^{2} + 6)}^{2}} + \frac{0 + \frac{35}{36}}{x^{2} + 6}$

Step 5.4

Add $0$ and $\frac{35}{36}$ .

$\frac{\frac{1}{36}}{x^{2}} + \frac{0}{x} + \frac{- \frac{31}{6}}{{(x^{2} + 6)}^{2}} + \frac{\frac{35}{36}}{x^{2} + 6}$