Precalculus Examples

$\frac{- 11 x - 34}{{(x - 2)}^{2} (x^{2} + 3)}$

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 in the denominator is linear, put a single variable in its place $A$ .

$\frac{A}{{(x - 2)}^{2}}$

Step 1.2

$\frac{A}{{(x - 2)}^{2}} + \frac{B}{x - 2}$

Step 1.3

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.

$\frac{A}{{(x - 2)}^{2}} + \frac{B}{x - 2} + \frac{C x + D}{x^{2} + 3}$

Step 1.4

Multiply each fraction in the equation by the denominator of the original expression. In this case, the denominator is ${(x - 2)}^{2} (x^{2} + 3)$ .

$\frac{(- 11 x - 34) {(x - 2)}^{2} (x^{2} + 3)}{{(x - 2)}^{2} (x^{2} + 3)} = \frac{(A) {(x - 2)}^{2} (x^{2} + 3)}{{(x - 2)}^{2}} + \frac{(B) {(x - 2)}^{2} (x^{2} + 3)}{x - 2} + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.5

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

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Step 1.5.1

Cancel the common factor.

Step 1.5.2

Rewrite the expression.

$\frac{(- 11 x - 34) (x^{2} + 3)}{x^{2} + 3} = \frac{(A) {(x - 2)}^{2} (x^{2} + 3)}{{(x - 2)}^{2}} + \frac{(B) {(x - 2)}^{2} (x^{2} + 3)}{x - 2} + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.6

Cancel the common factor of $x^{2} + 3$ .

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Step 1.6.1

Cancel the common factor.

Step 1.6.2

Divide $- 11 x - 34$ by $1$ .

$- 11 x - 34 = \frac{(A) {(x - 2)}^{2} (x^{2} + 3)}{{(x - 2)}^{2}} + \frac{(B) {(x - 2)}^{2} (x^{2} + 3)}{x - 2} + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.7

Simplify each term.

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Step 1.7.1

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

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Step 1.7.1.1

Cancel the common factor.

$- 11 x - 34 = \frac{A {(x - 2)}^{2} (x^{2} + 3)}{{(x - 2)}^{2}} + \frac{(B) {(x - 2)}^{2} (x^{2} + 3)}{x - 2} + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.7.1.2

Divide $(A) (x^{2} + 3)$ by $1$ .

$- 11 x - 34 = (A) (x^{2} + 3) + \frac{(B) {(x - 2)}^{2} (x^{2} + 3)}{x - 2} + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.7.2

Apply the distributive property.

$- 11 x - 34 = A x^{2} + A \cdot 3 + \frac{(B) {(x - 2)}^{2} (x^{2} + 3)}{x - 2} + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.7.3

Move $3$ to the left of $A$ .

$- 11 x - 34 = A x^{2} + 3 \cdot A + \frac{(B) {(x - 2)}^{2} (x^{2} + 3)}{x - 2} + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.7.4

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

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Step 1.7.4.1

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

$- 11 x - 34 = A x^{2} + 3 A + \frac{(x - 2) (B (x - 2) (x^{2} + 3))}{x - 2} + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.7.4.2

Cancel the common factors.

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Step 1.7.4.2.1

Multiply by $1$ .

$- 11 x - 34 = A x^{2} + 3 A + \frac{(x - 2) (B (x - 2) (x^{2} + 3))}{(x - 2) \cdot 1} + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.7.4.2.2

Cancel the common factor.

$- 11 x - 34 = A x^{2} + 3 A + \frac{(x - 2) (B (x - 2) (x^{2} + 3))}{(x - 2) \cdot 1} + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.7.4.2.3

Rewrite the expression.

$- 11 x - 34 = A x^{2} + 3 A + \frac{B (x - 2) (x^{2} + 3)}{1} + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.7.4.2.4

Divide $B (x - 2) (x^{2} + 3)$ by $1$ .

$- 11 x - 34 = A x^{2} + 3 A + B (x - 2) (x^{2} + 3) + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.7.5

Apply the distributive property.

$- 11 x - 34 = A x^{2} + 3 A + (B x + B \cdot - 2) (x^{2} + 3) + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.7.6

Move $- 2$ to the left of $B$ .

$- 11 x - 34 = A x^{2} + 3 A + (B x - 2 \cdot B) (x^{2} + 3) + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.7.7

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

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Step 1.7.7.1

Apply the distributive property.

$- 11 x - 34 = A x^{2} + 3 A + B x (x^{2} + 3) - 2 B (x^{2} + 3) + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.7.7.2

Apply the distributive property.

$- 11 x - 34 = A x^{2} + 3 A + B x \cdot x^{2} + B x \cdot 3 - 2 B (x^{2} + 3) + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.7.7.3

Apply the distributive property.

$- 11 x - 34 = A x^{2} + 3 A + B x \cdot x^{2} + B x \cdot 3 - 2 B x^{2} - 2 B \cdot 3 + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.7.8

Simplify each term.

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Step 1.7.8.1

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

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Step 1.7.8.1.1

Move $x^{2}$ .

$- 11 x - 34 = A x^{2} + 3 A + B (x^{2} x) + B x \cdot 3 - 2 B x^{2} - 2 B \cdot 3 + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.7.8.1.2

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

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Step 1.7.8.1.2.1

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

$- 11 x - 34 = A x^{2} + 3 A + B (x^{2} x) + B x \cdot 3 - 2 B x^{2} - 2 B \cdot 3 + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.7.8.1.2.2

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

$- 11 x - 34 = A x^{2} + 3 A + B x^{2 + 1} + B x \cdot 3 - 2 B x^{2} - 2 B \cdot 3 + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.7.8.1.3

Add $2$ and $1$ .

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + B x \cdot 3 - 2 B x^{2} - 2 B \cdot 3 + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.7.8.2

Move $3$ to the left of $B x$ .

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 \cdot (B x) - 2 B x^{2} - 2 B \cdot 3 + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.7.8.3

Multiply $3$ by $- 2$ .

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 B x - 2 B x^{2} - 6 B + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.7.9

Cancel the common factor of $x^{2} + 3$ .

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Step 1.7.9.1

Cancel the common factor.

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 B x - 2 B x^{2} - 6 B + \frac{(C x + D) {(x - 2)}^{2} (x^{2} + 3)}{x^{2} + 3}$

Step 1.7.9.2

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

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 B x - 2 B x^{2} - 6 B + (C x + D) {(x - 2)}^{2}$

Step 1.7.10

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

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 B x - 2 B x^{2} - 6 B + (C x + D) ((x - 2) (x - 2))$

Step 1.7.11

Expand $(x - 2) (x - 2)$ using the FOIL Method.

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Step 1.7.11.1

Apply the distributive property.

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 B x - 2 B x^{2} - 6 B + (C x + D) (x (x - 2) - 2 (x - 2))$

Step 1.7.11.2

Apply the distributive property.

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 B x - 2 B x^{2} - 6 B + (C x + D) (x \cdot x + x \cdot - 2 - 2 (x - 2))$

Step 1.7.11.3

Apply the distributive property.

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 B x - 2 B x^{2} - 6 B + (C x + D) (x \cdot x + x \cdot - 2 - 2 x - 2 \cdot - 2)$

Step 1.7.12

Simplify and combine like terms.

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Step 1.7.12.1

Simplify each term.

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Step 1.7.12.1.1

Multiply $x$ by $x$ .

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 B x - 2 B x^{2} - 6 B + (C x + D) (x^{2} + x \cdot - 2 - 2 x - 2 \cdot - 2)$

Step 1.7.12.1.2

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

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 B x - 2 B x^{2} - 6 B + (C x + D) (x^{2} - 2 \cdot x - 2 x - 2 \cdot - 2)$

Step 1.7.12.1.3

Multiply $- 2$ by $- 2$ .

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 B x - 2 B x^{2} - 6 B + (C x + D) (x^{2} - 2 x - 2 x + 4)$

Step 1.7.12.2

Subtract $2 x$ from $- 2 x$ .

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 B x - 2 B x^{2} - 6 B + (C x + D) (x^{2} - 4 x + 4)$

Step 1.7.13

Expand $(C x + D) (x^{2} - 4 x + 4)$ by multiplying each term in the first expression by each term in the second expression.

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 B x - 2 B x^{2} - 6 B + C x \cdot x^{2} + C x (- 4 x) + C x \cdot 4 + D x^{2} + D (- 4 x) + D \cdot 4$

Step 1.7.14

Simplify each term.

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Step 1.7.14.1

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

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Step 1.7.14.1.1

Move $x^{2}$ .

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 B x - 2 B x^{2} - 6 B + C (x^{2} x) + C x (- 4 x) + C x \cdot 4 + D x^{2} + D (- 4 x) + D \cdot 4$

Step 1.7.14.1.2

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

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Step 1.7.14.1.2.1

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

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 B x - 2 B x^{2} - 6 B + C (x^{2} x) + C x (- 4 x) + C x \cdot 4 + D x^{2} + D (- 4 x) + D \cdot 4$

Step 1.7.14.1.2.2

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

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 B x - 2 B x^{2} - 6 B + C x^{2 + 1} + C x (- 4 x) + C x \cdot 4 + D x^{2} + D (- 4 x) + D \cdot 4$

Step 1.7.14.1.3

Add $2$ and $1$ .

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 B x - 2 B x^{2} - 6 B + C x^{3} + C x (- 4 x) + C x \cdot 4 + D x^{2} + D (- 4 x) + D \cdot 4$

Step 1.7.14.2

Rewrite using the commutative property of multiplication.

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 B x - 2 B x^{2} - 6 B + C x^{3} - 4 C x \cdot x + C x \cdot 4 + D x^{2} + D (- 4 x) + D \cdot 4$

Step 1.7.14.3

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

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Step 1.7.14.3.1

Move $x$ .

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 B x - 2 B x^{2} - 6 B + C x^{3} - 4 C (x \cdot x) + C x \cdot 4 + D x^{2} + D (- 4 x) + D \cdot 4$

Step 1.7.14.3.2

Multiply $x$ by $x$ .

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 B x - 2 B x^{2} - 6 B + C x^{3} - 4 C x^{2} + C x \cdot 4 + D x^{2} + D (- 4 x) + D \cdot 4$

Step 1.7.14.4

Move $4$ to the left of $C x$ .

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 B x - 2 B x^{2} - 6 B + C x^{3} - 4 C x^{2} + 4 \cdot (C x) + D x^{2} + D (- 4 x) + D \cdot 4$

Step 1.7.14.5

Rewrite using the commutative property of multiplication.

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 B x - 2 B x^{2} - 6 B + C x^{3} - 4 C x^{2} + 4 C x + D x^{2} - 4 D x + D \cdot 4$

Step 1.7.14.6

Move $4$ to the left of $D$ .

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 B x - 2 B x^{2} - 6 B + C x^{3} - 4 C x^{2} + 4 C x + D x^{2} - 4 D x + 4 D$

Step 1.8

Simplify the expression.

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Step 1.8.1

Move $B$ .

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 x B - 2 B x^{2} - 6 B + C x^{3} - 4 C x^{2} + 4 C x + D x^{2} - 4 D x + 4 D$

Step 1.8.2

Move $B$ .

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 x B - 2 x^{2} B - 6 B + C x^{3} - 4 C x^{2} + 4 C x + D x^{2} - 4 D x + 4 D$

Step 1.8.3

Move $- 6 B$ .

$- 11 x - 34 = A x^{2} + 3 A + B x^{3} + 3 x B - 2 x^{2} B + C x^{3} - 4 C x^{2} + 4 C x + D x^{2} - 4 D x - 6 B + 4 D$

Step 1.8.4

Move $3 A$ .

$- 11 x - 34 = A x^{2} + B x^{3} + 3 x B - 2 x^{2} B + C x^{3} - 4 C x^{2} + 4 C x + D x^{2} - 4 D x + 3 A - 6 B + 4 D$

Step 1.8.5

Move $4 C x$ .

$- 11 x - 34 = A x^{2} + B x^{3} + 3 x B - 2 x^{2} B + C x^{3} - 4 C x^{2} + D x^{2} + 4 C x - 4 D x + 3 A - 6 B + 4 D$

Step 1.8.6

Move $3 x B$ .

$- 11 x - 34 = A x^{2} + B x^{3} - 2 x^{2} B + C x^{3} - 4 C x^{2} + D x^{2} + 3 x B + 4 C x - 4 D x + 3 A - 6 B + 4 D$

Step 1.8.7

Move $- 2 x^{2} B$ .

$- 11 x - 34 = A x^{2} + B x^{3} + C x^{3} - 2 x^{2} B - 4 C x^{2} + D x^{2} + 3 x B + 4 C x - 4 D x + 3 A - 6 B + 4 D$

Step 1.8.8

Move $A x^{2}$ .

$- 11 x - 34 = B x^{3} + C x^{3} + A x^{2} - 2 x^{2} B - 4 C x^{2} + D x^{2} + 3 x B + 4 C x - 4 D x + 3 A - 6 B + 4 D$

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 $x^{3}$ from each side of the equation. For the equation to be equal, the equivalent coefficients on each side of the equation must be equal.

$0 = B + C$

Step 2.2

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.

$0 = A - 2 B - 4 C + D$

Step 2.3

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.

$- 11 = 3 B + 4 C - 4 D$

Step 2.4

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.

$- 34 = 3 A - 6 B + 4 D$

Step 2.5

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

$0 = B + C$

$0 = A - 2 B - 4 C + D$

$- 11 = 3 B + 4 C - 4 D$

$- 34 = 3 A - 6 B + 4 D$

$0 = B + C$

$0 = A - 2 B - 4 C + D$

$- 11 = 3 B + 4 C - 4 D$

$- 34 = 3 A - 6 B + 4 D$

Step 3

Solve the system of equations.

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Step 3.1

Solve for $B$ in $0 = B + C$ .

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Step 3.1.1

Rewrite the equation as $B + C = 0$ .

$B + C = 0$

$0 = A - 2 B - 4 C + D$

$- 11 = 3 B + 4 C - 4 D$

$- 34 = 3 A - 6 B + 4 D$

Step 3.1.2

Subtract $C$ from both sides of the equation.

$B = - C$

$0 = A - 2 B - 4 C + D$

$- 11 = 3 B + 4 C - 4 D$

$- 34 = 3 A - 6 B + 4 D$

$B = - C$

$0 = A - 2 B - 4 C + D$

$- 11 = 3 B + 4 C - 4 D$

$- 34 = 3 A - 6 B + 4 D$

Step 3.2

Replace all occurrences of $B$ with $- C$ in each equation.

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Step 3.2.1

Replace all occurrences of $B$ in $0 = A - 2 B - 4 C + D$ with $- C$ .

$0 = A - 2 (- C) - 4 C + D$

$B = - C$

$- 11 = 3 B + 4 C - 4 D$

$- 34 = 3 A - 6 B + 4 D$

Step 3.2.2

Simplify the right side.

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Step 3.2.2.1

Simplify $A - 2 (- C) - 4 C + D$ .

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Step 3.2.2.1.1

Multiply $- 1$ by $- 2$ .

$0 = A + 2 C - 4 C + D$

$B = - C$

$- 11 = 3 B + 4 C - 4 D$

$- 34 = 3 A - 6 B + 4 D$

Step 3.2.2.1.2

Subtract $4 C$ from $2 C$ .

$0 = A - 2 C + D$

$B = - C$

$- 11 = 3 B + 4 C - 4 D$

$- 34 = 3 A - 6 B + 4 D$

$0 = A - 2 C + D$

$B = - C$

$- 11 = 3 B + 4 C - 4 D$

$- 34 = 3 A - 6 B + 4 D$

$0 = A - 2 C + D$

$B = - C$

$- 11 = 3 B + 4 C - 4 D$

$- 34 = 3 A - 6 B + 4 D$

Step 3.2.3

Replace all occurrences of $B$ in $- 11 = 3 B + 4 C - 4 D$ with $- C$ .

$- 11 = 3 (- C) + 4 C - 4 D$

$0 = A - 2 C + D$

$B = - C$

$- 34 = 3 A - 6 B + 4 D$

Step 3.2.4

Simplify the right side.

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Step 3.2.4.1

Simplify $3 (- C) + 4 C - 4 D$ .

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Step 3.2.4.1.1

Multiply $- 1$ by $3$ .

$- 11 = - 3 C + 4 C - 4 D$

$0 = A - 2 C + D$

$B = - C$

$- 34 = 3 A - 6 B + 4 D$

Step 3.2.4.1.2

Add $- 3 C$ and $4 C$ .

$- 11 = C - 4 D$

$0 = A - 2 C + D$

$B = - C$

$- 34 = 3 A - 6 B + 4 D$

$- 11 = C - 4 D$

$0 = A - 2 C + D$

$B = - C$

$- 34 = 3 A - 6 B + 4 D$

$- 11 = C - 4 D$

$0 = A - 2 C + D$

$B = - C$

$- 34 = 3 A - 6 B + 4 D$

Step 3.2.5

Replace all occurrences of $B$ in $- 34 = 3 A - 6 B + 4 D$ with $- C$ .

$- 34 = 3 A - 6 (- C) + 4 D$

$- 11 = C - 4 D$

$0 = A - 2 C + D$

$B = - C$

Step 3.2.6

Simplify the right side.

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Step 3.2.6.1

Multiply $- 1$ by $- 6$ .

$- 34 = 3 A + 6 C + 4 D$

$- 11 = C - 4 D$

$0 = A - 2 C + D$

$B = - C$

$- 34 = 3 A + 6 C + 4 D$

$- 11 = C - 4 D$

$0 = A - 2 C + D$

$B = - C$

$- 34 = 3 A + 6 C + 4 D$

$- 11 = C - 4 D$

$0 = A - 2 C + D$

$B = - C$

Step 3.3

Solve for $C$ in $- 11 = C - 4 D$ .

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Step 3.3.1

Rewrite the equation as $C - 4 D = - 11$ .

$C - 4 D = - 11$

$- 34 = 3 A + 6 C + 4 D$

$0 = A - 2 C + D$

$B = - C$

Step 3.3.2

Add $4 D$ to both sides of the equation.

$C = - 11 + 4 D$

$- 34 = 3 A + 6 C + 4 D$

$0 = A - 2 C + D$

$B = - C$

$C = - 11 + 4 D$

$- 34 = 3 A + 6 C + 4 D$

$0 = A - 2 C + D$

$B = - C$

Step 3.4

Replace all occurrences of $C$ with $- 11 + 4 D$ in each equation.

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Step 3.4.1

Replace all occurrences of $C$ in $- 34 = 3 A + 6 C + 4 D$ with $- 11 + 4 D$ .

$- 34 = 3 A + 6 (- 11 + 4 D) + 4 D$

$C = - 11 + 4 D$

$0 = A - 2 C + D$

$B = - C$

Step 3.4.2

Simplify the right side.

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Step 3.4.2.1

Simplify $3 A + 6 (- 11 + 4 D) + 4 D$ .

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Step 3.4.2.1.1

Simplify each term.

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Step 3.4.2.1.1.1

Apply the distributive property.

$- 34 = 3 A + 6 \cdot - 11 + 6 (4 D) + 4 D$

$C = - 11 + 4 D$

$0 = A - 2 C + D$

$B = - C$

Step 3.4.2.1.1.2

Multiply $6$ by $- 11$ .

$- 34 = 3 A - 66 + 6 (4 D) + 4 D$

$C = - 11 + 4 D$

$0 = A - 2 C + D$

$B = - C$

Step 3.4.2.1.1.3

Multiply $4$ by $6$ .

$- 34 = 3 A - 66 + 24 D + 4 D$

$C = - 11 + 4 D$

$0 = A - 2 C + D$

$B = - C$

$- 34 = 3 A - 66 + 24 D + 4 D$

$C = - 11 + 4 D$

$0 = A - 2 C + D$

$B = - C$

Step 3.4.2.1.2

Add $24 D$ and $4 D$ .

$- 34 = 3 A - 66 + 28 D$

$C = - 11 + 4 D$

$0 = A - 2 C + D$

$B = - C$

$- 34 = 3 A - 66 + 28 D$

$C = - 11 + 4 D$

$0 = A - 2 C + D$

$B = - C$

$- 34 = 3 A - 66 + 28 D$

$C = - 11 + 4 D$

$0 = A - 2 C + D$

$B = - C$

Step 3.4.3

Replace all occurrences of $C$ in $0 = A - 2 C + D$ with $- 11 + 4 D$ .

$0 = A - 2 (- 11 + 4 D) + D$

$- 34 = 3 A - 66 + 28 D$

$C = - 11 + 4 D$

$B = - C$

Step 3.4.4

Simplify the right side.

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Step 3.4.4.1

Simplify $A - 2 (- 11 + 4 D) + D$ .

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Step 3.4.4.1.1

Simplify each term.

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Step 3.4.4.1.1.1

Apply the distributive property.

$0 = A - 2 \cdot - 11 - 2 (4 D) + D$

$- 34 = 3 A - 66 + 28 D$

$C = - 11 + 4 D$

$B = - C$

Step 3.4.4.1.1.2

Multiply $- 2$ by $- 11$ .

$0 = A + 22 - 2 (4 D) + D$

$- 34 = 3 A - 66 + 28 D$

$C = - 11 + 4 D$

$B = - C$

Step 3.4.4.1.1.3

Multiply $4$ by $- 2$ .

$0 = A + 22 - 8 D + D$

$- 34 = 3 A - 66 + 28 D$

$C = - 11 + 4 D$

$B = - C$

$0 = A + 22 - 8 D + D$

$- 34 = 3 A - 66 + 28 D$

$C = - 11 + 4 D$

$B = - C$

Step 3.4.4.1.2

Add $- 8 D$ and $D$ .

$0 = A + 22 - 7 D$

$- 34 = 3 A - 66 + 28 D$

$C = - 11 + 4 D$

$B = - C$

$0 = A + 22 - 7 D$

$- 34 = 3 A - 66 + 28 D$

$C = - 11 + 4 D$

$B = - C$

$0 = A + 22 - 7 D$

$- 34 = 3 A - 66 + 28 D$

$C = - 11 + 4 D$

$B = - C$

Step 3.4.5

Replace all occurrences of $C$ in $B = - C$ with $- 11 + 4 D$ .

$B = - (- 11 + 4 D)$

$0 = A + 22 - 7 D$

$- 34 = 3 A - 66 + 28 D$

$C = - 11 + 4 D$

Step 3.4.6

Simplify the right side.

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Step 3.4.6.1

Simplify $- (- 11 + 4 D)$ .

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Step 3.4.6.1.1

Apply the distributive property.

$B = 11 - (4 D)$

$0 = A + 22 - 7 D$

$- 34 = 3 A - 66 + 28 D$

$C = - 11 + 4 D$

Step 3.4.6.1.2

Multiply.

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Step 3.4.6.1.2.1

Multiply $- 1$ by $- 11$ .

$B = 11 - (4 D)$

$0 = A + 22 - 7 D$

$- 34 = 3 A - 66 + 28 D$

$C = - 11 + 4 D$

Step 3.4.6.1.2.2

Multiply $4$ by $- 1$ .

$B = 11 - 4 D$

$0 = A + 22 - 7 D$

$- 34 = 3 A - 66 + 28 D$

$C = - 11 + 4 D$

$B = 11 - 4 D$

$0 = A + 22 - 7 D$

$- 34 = 3 A - 66 + 28 D$

$C = - 11 + 4 D$

$B = 11 - 4 D$

$0 = A + 22 - 7 D$

$- 34 = 3 A - 66 + 28 D$

$C = - 11 + 4 D$

$B = 11 - 4 D$

$0 = A + 22 - 7 D$

$- 34 = 3 A - 66 + 28 D$

$C = - 11 + 4 D$

$B = 11 - 4 D$

$0 = A + 22 - 7 D$

$- 34 = 3 A - 66 + 28 D$

$C = - 11 + 4 D$

Step 3.5

Reorder $11$ and $- 4 D$ .

$B = - 4 D + 11$

$0 = A + 22 - 7 D$

$- 34 = 3 A - 66 + 28 D$

$C = - 11 + 4 D$

Step 3.6

Reorder $- 11$ and $4 D$ .

$C = 4 D - 11$

$B = - 4 D + 11$

$0 = A + 22 - 7 D$

$- 34 = 3 A - 66 + 28 D$

Step 3.7

Solve for $A$ in $0 = A + 22 - 7 D$ .

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Step 3.7.1

Rewrite the equation as $A + 22 - 7 D = 0$ .

$A + 22 - 7 D = 0$

$C = 4 D - 11$

$B = - 4 D + 11$

$- 34 = 3 A - 66 + 28 D$

Step 3.7.2

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

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Step 3.7.2.1

Subtract $22$ from both sides of the equation.

$A - 7 D = - 22$

$C = 4 D - 11$

$B = - 4 D + 11$

$- 34 = 3 A - 66 + 28 D$

Step 3.7.2.2

Add $7 D$ to both sides of the equation.

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

$- 34 = 3 A - 66 + 28 D$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

$- 34 = 3 A - 66 + 28 D$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

$- 34 = 3 A - 66 + 28 D$

Step 3.8

Replace all occurrences of $A$ with $- 22 + 7 D$ in each equation.

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Step 3.8.1

Replace all occurrences of $A$ in $- 34 = 3 A - 66 + 28 D$ with $- 22 + 7 D$ .

$- 34 = 3 (- 22 + 7 D) - 66 + 28 D$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

Step 3.8.2

Simplify the right side.

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Step 3.8.2.1

Simplify $3 (- 22 + 7 D) - 66 + 28 D$ .

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Step 3.8.2.1.1

Simplify each term.

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Step 3.8.2.1.1.1

Apply the distributive property.

$- 34 = 3 \cdot - 22 + 3 (7 D) - 66 + 28 D$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

Step 3.8.2.1.1.2

Multiply $3$ by $- 22$ .

$- 34 = - 66 + 3 (7 D) - 66 + 28 D$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

Step 3.8.2.1.1.3

Multiply $7$ by $3$ .

$- 34 = - 66 + 21 D - 66 + 28 D$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

$- 34 = - 66 + 21 D - 66 + 28 D$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

Step 3.8.2.1.2

Simplify by adding terms.

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Step 3.8.2.1.2.1

Subtract $66$ from $- 66$ .

$- 34 = 21 D - 132 + 28 D$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

Step 3.8.2.1.2.2

Add $21 D$ and $28 D$ .

$- 34 = 49 D - 132$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

$- 34 = 49 D - 132$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

$- 34 = 49 D - 132$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

$- 34 = 49 D - 132$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

$- 34 = 49 D - 132$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

Step 3.9

Solve for $D$ in $- 34 = 49 D - 132$ .

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Step 3.9.1

Rewrite the equation as $49 D - 132 = - 34$ .

$49 D - 132 = - 34$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

Step 3.9.2

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

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Step 3.9.2.1

Add $132$ to both sides of the equation.

$49 D = - 34 + 132$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

Step 3.9.2.2

Add $- 34$ and $132$ .

$49 D = 98$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

$49 D = 98$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

Step 3.9.3

Divide each term in $49 D = 98$ by $49$ and simplify.

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Step 3.9.3.1

Divide each term in $49 D = 98$ by $49$ .

$\frac{49 D}{49} = \frac{98}{49}$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

Step 3.9.3.2

Simplify the left side.

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Step 3.9.3.2.1

Cancel the common factor of $49$ .

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Step 3.9.3.2.1.1

Cancel the common factor.

$\frac{49 D}{49} = \frac{98}{49}$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

Step 3.9.3.2.1.2

Divide $D$ by $1$ .

$D = \frac{98}{49}$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

$D = \frac{98}{49}$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

$D = \frac{98}{49}$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

Step 3.9.3.3

Simplify the right side.

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Step 3.9.3.3.1

Divide $98$ by $49$ .

$D = 2$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

$D = 2$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

$D = 2$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

$D = 2$

$A = - 22 + 7 D$

$C = 4 D - 11$

$B = - 4 D + 11$

Step 3.10

Replace all occurrences of $D$ with $2$ in each equation.

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Step 3.10.1

Replace all occurrences of $D$ in $A = - 22 + 7 D$ with $2$ .

$A = - 22 + 7 (2)$

$D = 2$

$C = 4 D - 11$

$B = - 4 D + 11$

Step 3.10.2

Simplify the right side.

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Step 3.10.2.1

Simplify $- 22 + 7 (2)$ .

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Step 3.10.2.1.1

Multiply $7$ by $2$ .

$A = - 22 + 14$

$D = 2$

$C = 4 D - 11$

$B = - 4 D + 11$

Step 3.10.2.1.2

Add $- 22$ and $14$ .

$A = - 8$

$D = 2$

$C = 4 D - 11$

$B = - 4 D + 11$

$A = - 8$

$D = 2$

$C = 4 D - 11$

$B = - 4 D + 11$

$A = - 8$

$D = 2$

$C = 4 D - 11$

$B = - 4 D + 11$

Step 3.10.3

Replace all occurrences of $D$ in $C = 4 D - 11$ with $2$ .

$C = 4 (2) - 11$

$A = - 8$

$D = 2$

$B = - 4 D + 11$

Step 3.10.4

Simplify the right side.

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Step 3.10.4.1

Simplify $4 (2) - 11$ .

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Step 3.10.4.1.1

Multiply $4$ by $2$ .

$C = 8 - 11$

$A = - 8$

$D = 2$

$B = - 4 D + 11$

Step 3.10.4.1.2

Subtract $11$ from $8$ .

$C = - 3$

$A = - 8$

$D = 2$

$B = - 4 D + 11$

$C = - 3$

$A = - 8$

$D = 2$

$B = - 4 D + 11$

$C = - 3$

$A = - 8$

$D = 2$

$B = - 4 D + 11$

Step 3.10.5

Replace all occurrences of $D$ in $B = - 4 D + 11$ with $2$ .

$B = - 4 \cdot 2 + 11$

$C = - 3$

$A = - 8$

$D = 2$

Step 3.10.6

Simplify the right side.

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Step 3.10.6.1

Simplify $- 4 \cdot 2 + 11$ .

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Step 3.10.6.1.1

Multiply $- 4$ by $2$ .

$B = - 8 + 11$

$C = - 3$

$A = - 8$

$D = 2$

Step 3.10.6.1.2

Add $- 8$ and $11$ .

$B = 3$

$C = - 3$

$A = - 8$

$D = 2$

$B = 3$

$C = - 3$

$A = - 8$

$D = 2$

$B = 3$

$C = - 3$

$A = - 8$

$D = 2$

$B = 3$

$C = - 3$

$A = - 8$

$D = 2$

Step 3.11

List all of the solutions.

$B = 3, C = - 3, A = - 8, D = 2$

Step 4

Replace each of the partial fraction coefficients in $\frac{A}{{(x - 2)}^{2}} + \frac{B}{x - 2} + \frac{C x + D}{x^{2} + 3}$ with the values found for $A$ , $B$ , $C$ , and $D$ .

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

Step 5

Simplify.

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Step 5.1

Remove parentheses.

$\frac{- 8}{{(x - 2)}^{2}} + \frac{3}{x - 2} + \frac{(- 3) \cdot x + 2}{x^{2} + 3}$

Step 5.2

Multiply $- 3$ by $x$ .

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