Finite Math Examples

(\frac{- x - 1 + 4 i}{1 + 2 i - i x}) i (2 - i) + 1 = 4 i - x (1 - \frac{- x - 1 + 4 i}{1 + 2 i - i x} i)

$(\frac{- x - 1 + 4 i}{1 + 2 i - i x}) i (2 - i) + 1 = 4 i - x (1 - \frac{- x - 1 + 4 i}{1 + 2 i - i x} i)$

Step 1

Since

$x$ is on the right side of the equation, switch the sides so it is on the left side of the equation.

$4 i - x (1 - \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot i) = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2

Simplify

$4 i - x (1 - \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot i)$ .

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Step 2.1

Simplify each term.

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Step 2.1.1

Simplify each term.

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Step 2.1.1.1

Reorder terms.

$4 i - x (1 - \frac{- x - 1 + 4 i}{- i x + 1 + 2 i} \cdot i) = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.1.2

Combine

$i$ and

$\frac{- x - 1 + 4 i}{- i x + 1 + 2 i}$ .

$4 i - x (1 - \frac{i (- x - 1 + 4 i)}{- i x + 1 + 2 i}) = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.1.3

Apply the distributive property.

$4 i - x (1 - \frac{i (- x) + i \cdot - 1 + i (4 i)}{- i x + 1 + 2 i}) = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.1.4

Simplify.

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Step 2.1.1.4.1

Move

$- 1$ to the left of

$i$ .

$4 i - x (1 - \frac{i (- x) - 1 \cdot i + i (4 i)}{- i x + 1 + 2 i}) = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.1.4.2

Multiply

$i (4 i)$ .

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Step 2.1.1.4.2.1

Raise

$i$ to the power of

$1$ .

$4 i - x (1 - \frac{i (- x) - 1 \cdot i + 4 (i^{1} i)}{- i x + 1 + 2 i}) = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.1.4.2.2

Raise

$i$ to the power of

$1$ .

$4 i - x (1 - \frac{i (- x) - 1 \cdot i + 4 (i^{1} i^{1})}{- i x + 1 + 2 i}) = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.1.4.2.3

Use the power rule

$a^{m} a^{n} = a^{m + n}$ to combine exponents.

$4 i - x (1 - \frac{i (- x) - 1 \cdot i + 4 i^{1 + 1}}{- i x + 1 + 2 i}) = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.1.4.2.4

Add

$1$ and

$1$ .

$4 i - x (1 - \frac{i (- x) - 1 \cdot i + 4 i^{2}}{- i x + 1 + 2 i}) = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.1.5

Simplify each term.

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Step 2.1.1.5.1

Rewrite

$- 1 i$ as

$- i$ .

$4 i - x (1 - \frac{i (- x) - i + 4 i^{2}}{- i x + 1 + 2 i}) = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.1.5.2

Rewrite

$i^{2}$ as

$- 1$ .

$4 i - x (1 - \frac{i (- x) - i + 4 \cdot - 1}{- i x + 1 + 2 i}) = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.1.5.3

Multiply

$4$ by

$- 1$ .

$4 i - x (1 - \frac{i (- x) - i - 4}{- i x + 1 + 2 i}) = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.1.6

Reorder factors in

$i (- x) - i - 4$ .

$4 i - x (1 - \frac{- i x - i - 4}{- i x + 1 + 2 i}) = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.1.7

Reorder terms.

$4 i - x (1 - \frac{- i x - 4 - i}{- i x + 1 + 2 i}) = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.2

Write

$1$ as a fraction with a common denominator.

$4 i - x (\frac{- i x + 1 + 2 i}{- i x + 1 + 2 i} - \frac{- i x - 4 - i}{- i x + 1 + 2 i}) = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.3

Combine the numerators over the common denominator.

$4 i - x \frac{- i x + 1 + 2 i - (- i x - 4 - i)}{- i x + 1 + 2 i} = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.4

Simplify the numerator.

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Step 2.1.4.1

Apply the distributive property.

$4 i - x \frac{- i x + 1 + 2 i - (- i x) - - 4 - - i}{- i x + 1 + 2 i} = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.4.2

Simplify.

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Step 2.1.4.2.1

Multiply

$- (- i x)$ .

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Step 2.1.4.2.1.1

Multiply

$- 1$ by

$- 1$ .

$4 i - x \frac{- i x + 1 + 2 i + 1 (i x) - - 4 - - i}{- i x + 1 + 2 i} = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.4.2.1.2

Multiply

$x$ by

$1$ .

$4 i - x \frac{- i x + 1 + 2 i + x i - - 4 - - i}{- i x + 1 + 2 i} = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.4.2.2

Multiply

$- 1$ by

$- 4$ .

$4 i - x \frac{- i x + 1 + 2 i + x i + 4 - - i}{- i x + 1 + 2 i} = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.4.2.3

Multiply

$- 1$ by

$- 1$ .

$4 i - x \frac{- i x + 1 + 2 i + x i + 4 + 1 i}{- i x + 1 + 2 i} = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.4.3

Multiply

$i$ by

$1$ .

$4 i - x \frac{- i x + 1 + 2 i + x i + 4 + i}{- i x + 1 + 2 i} = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.4.4

Add

$- i x$ and

$x i$ .

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Step 2.1.4.4.1

Move

$i$ .

$4 i - x \frac{- 1 x i + x i + 1 + 2 i + 4 + i}{- i x + 1 + 2 i} = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.4.4.2

Add

$- 1 x i$ and

$x i$ .

$4 i - x \frac{0 + 1 + 2 i + 4 + i}{- i x + 1 + 2 i} = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.4.5

Add

$0$ and

$1$ .

$4 i - x \frac{1 + 2 i + 4 + i}{- i x + 1 + 2 i} = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.4.6

Add

$1$ and

$4$ .

$4 i - x \frac{5 + 2 i + i}{- i x + 1 + 2 i} = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.4.7

Add

$2 i$ and

$i$ .

$4 i - x \frac{5 + 3 i}{- i x + 1 + 2 i} = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.1.5

Combine

$\frac{5 + 3 i}{- i x + 1 + 2 i}$ and

$x$ .

$4 i - \frac{(5 + 3 i) x}{- i x + 1 + 2 i} = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.2

To write

$4 i$ as a fraction with a common denominator, multiply by

$\frac{- i x + 1 + 2 i}{- i x + 1 + 2 i}$ .

$\frac{4 i (- i x + 1 + 2 i)}{- i x + 1 + 2 i} - \frac{(5 + 3 i) x}{- i x + 1 + 2 i} = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.3

Combine the numerators over the common denominator.

$\frac{4 i (- i x + 1 + 2 i) - (5 + 3 i) x}{- i x + 1 + 2 i} = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.4

Factor

$- 1$ out of

$- i x$ .

$\frac{4 i (- i x + 1 + 2 i) - (5 + 3 i) x}{- (i x) + 1 + 2 i} = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.5

Rewrite

$1$ as

$- 1 (- 1)$ .

$\frac{4 i (- i x + 1 + 2 i) - (5 + 3 i) x}{- (i x) - 1 (- 1) + 2 i} = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.6

Factor

$- 1$ out of

$- (i x) - 1 (- 1)$ .

$\frac{4 i (- i x + 1 + 2 i) - (5 + 3 i) x}{- (i x - 1) + 2 i} = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.7

Factor

$- 1$ out of

$2 i$ .

$\frac{4 i (- i x + 1 + 2 i) - (5 + 3 i) x}{- (i x - 1) - (- 2 i)} = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.8

Factor

$- 1$ out of

$- (i x - 1) - (- 2 i)$ .

$\frac{4 i (- i x + 1 + 2 i) - (5 + 3 i) x}{- (i x - 1 - 2 i)} = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.9

Rewrite negatives.

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Step 2.9.1

Rewrite

$- (i x - 1 - 2 i)$ as

$- 1 (i x - 1 - 2 i)$ .

$\frac{4 i (- i x + 1 + 2 i) - (5 + 3 i) x}{- 1 (i x - 1 - 2 i)} = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.9.2

Move the negative in front of the fraction.

$- \frac{4 i (- i x + 1 + 2 i) - (5 + 3 i) x}{i x - 1 - 2 i} = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 2.9.3

Reorder factors in

$- \frac{4 i (- i x + 1 + 2 i) - (5 + 3 i) x}{i x - 1 - 2 i}$ .

$- \frac{4 i (- i x + 1 + 2 i) - x (5 + 3 i)}{i x - 1 - 2 i} = \frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$

Step 3

Simplify

$\frac{- x - 1 + 4 i}{1 + 2 i - i x} \cdot (i (2 - i)) + 1$ .

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Step 3.1

Simplify each term.

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Step 3.1.1

Reorder terms.

$- \frac{4 i (- i x + 1 + 2 i) - x (5 + 3 i)}{i x - 1 - 2 i} = \frac{- x - 1 + 4 i}{- i x + 1 + 2 i} \cdot (i (2 - i)) + 1$

Step 3.1.2

Apply the distributive property.

$- \frac{4 i (- i x + 1 + 2 i) - x (5 + 3 i)}{i x - 1 - 2 i} = \frac{- x - 1 + 4 i}{- i x + 1 + 2 i} \cdot (i \cdot 2 + i (- i)) + 1$

Step 3.1.3

Move

$2$ to the left of

$i$ .

$- \frac{4 i (- i x + 1 + 2 i) - x (5 + 3 i)}{i x - 1 - 2 i} = \frac{- x - 1 + 4 i}{- i x + 1 + 2 i} \cdot (2 \cdot i + i (- i)) + 1$

Step 3.1.4

Multiply

$i (- i)$ .

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Step 3.1.4.1

Raise

$i$ to the power of

$1$ .

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

Step 3.1.4.2

Raise

$i$ to the power of

$1$ .

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

Step 3.1.4.3

Use the power rule

$a^{m} a^{n} = a^{m + n}$ to combine exponents.

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

Step 3.1.4.4

Add

$1$ and

$1$ .

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

Step 3.1.5

Simplify each term.

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Step 3.1.5.1

Rewrite

$i^{2}$ as

$- 1$ .

$- \frac{4 i (- i x + 1 + 2 i) - x (5 + 3 i)}{i x - 1 - 2 i} = \frac{- x - 1 + 4 i}{- i x + 1 + 2 i} \cdot (2 i - - 1) + 1$

Step 3.1.5.2

Multiply

$- 1$ by

$- 1$ .

$- \frac{4 i (- i x + 1 + 2 i) - x (5 + 3 i)}{i x - 1 - 2 i} = \frac{- x - 1 + 4 i}{- i x + 1 + 2 i} \cdot (2 i + 1) + 1$

Step 3.1.6

Multiply

$\frac{- x - 1 + 4 i}{- i x + 1 + 2 i}$ by

$2 i + 1$ .

$- \frac{4 i (- i x + 1 + 2 i) - x (5 + 3 i)}{i x - 1 - 2 i} = \frac{(- x - 1 + 4 i) (2 i + 1)}{- i x + 1 + 2 i} + 1$

Step 3.2

Simplify terms.

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Step 3.2.1

Write

$1$ as a fraction with a common denominator.

$- \frac{4 i (- i x + 1 + 2 i) - x (5 + 3 i)}{i x - 1 - 2 i} = \frac{(- x - 1 + 4 i) (2 i + 1)}{- i x + 1 + 2 i} + \frac{- i x + 1 + 2 i}{- i x + 1 + 2 i}$

Step 3.2.2

Combine the numerators over the common denominator.

$- \frac{4 i (- i x + 1 + 2 i) - x (5 + 3 i)}{i x - 1 - 2 i} = \frac{(- x - 1 + 4 i) (2 i + 1) - i x + 1 + 2 i}{- i x + 1 + 2 i}$

Step 3.2.3

Factor

$- 1$ out of

$- i x$ .

$- \frac{4 i (- i x + 1 + 2 i) - x (5 + 3 i)}{i x - 1 - 2 i} = \frac{(- x - 1 + 4 i) (2 i + 1) - i x + 1 + 2 i}{- (i x) + 1 + 2 i}$

Step 3.2.4

Rewrite

$1$ as

$- 1 (- 1)$ .

$- \frac{4 i (- i x + 1 + 2 i) - x (5 + 3 i)}{i x - 1 - 2 i} = \frac{(- x - 1 + 4 i) (2 i + 1) - i x + 1 + 2 i}{- (i x) - 1 (- 1) + 2 i}$

Step 3.2.5

Factor

$- 1$ out of

$- (i x) - 1 (- 1)$ .

$- \frac{4 i (- i x + 1 + 2 i) - x (5 + 3 i)}{i x - 1 - 2 i} = \frac{(- x - 1 + 4 i) (2 i + 1) - i x + 1 + 2 i}{- (i x - 1) + 2 i}$

Step 3.2.6

Factor

$- 1$ out of

$2 i$ .

$- \frac{4 i (- i x + 1 + 2 i) - x (5 + 3 i)}{i x - 1 - 2 i} = \frac{(- x - 1 + 4 i) (2 i + 1) - i x + 1 + 2 i}{- (i x - 1) - (- 2 i)}$

Step 3.2.7

Factor

$- 1$ out of

$- (i x - 1) - (- 2 i)$ .

$- \frac{4 i (- i x + 1 + 2 i) - x (5 + 3 i)}{i x - 1 - 2 i} = \frac{(- x - 1 + 4 i) (2 i + 1) - i x + 1 + 2 i}{- (i x - 1 - 2 i)}$

Step 3.2.8

Simplify the expression.

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Step 3.2.8.1

Rewrite

$- (i x - 1 - 2 i)$ as

$- 1 (i x - 1 - 2 i)$ .

$- \frac{4 i (- i x + 1 + 2 i) - x (5 + 3 i)}{i x - 1 - 2 i} = \frac{(- x - 1 + 4 i) (2 i + 1) - i x + 1 + 2 i}{- 1 (i x - 1 - 2 i)}$

Step 3.2.8.2

Move the negative in front of the fraction.

$- \frac{4 i (- i x + 1 + 2 i) - x (5 + 3 i)}{i x - 1 - 2 i} = - \frac{(- x - 1 + 4 i) (2 i + 1) - i x + 1 + 2 i}{i x - 1 - 2 i}$

Step 3.2.8.3

Reorder

$2 i$ and

$1$ .

$- \frac{4 i (- i x + 1 + 2 i) - x (5 + 3 i)}{i x - 1 - 2 i} = - \frac{(- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i}$

Step 4

Move all terms containing

$x$ to the left side of the equation.

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Step 4.1

Add

$\frac{(- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i}$ to both sides of the equation.

$- \frac{4 i (- i x + 1 + 2 i) - x (5 + 3 i)}{i x - 1 - 2 i} + \frac{(- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.2

Combine the numerators over the common denominator.

$\frac{- (4 i (- i x + 1 + 2 i) - x (5 + 3 i)) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3

Simplify each term.

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Step 4.3.1

Simplify each term.

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Step 4.3.1.1

Apply the distributive property.

$\frac{- (4 i (- i x) + 4 i \cdot 1 + 4 i (2 i) - x (5 + 3 i)) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.1.2

Simplify.

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Step 4.3.1.2.1

Multiply

$4 i (- i x)$ .

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Step 4.3.1.2.1.1

Multiply

$- 1$ by

$4$ .

$\frac{- (- 4 i (i x) + 4 i \cdot 1 + 4 i (2 i) - x (5 + 3 i)) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.1.2.1.2

Raise

$i$ to the power of

$1$ .

$\frac{- (- 4 (i^{1} i) x + 4 i \cdot 1 + 4 i (2 i) - x (5 + 3 i)) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.1.2.1.3

Raise

$i$ to the power of

$1$ .

$\frac{- (- 4 (i^{1} i^{1}) x + 4 i \cdot 1 + 4 i (2 i) - x (5 + 3 i)) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.1.2.1.4

Use the power rule

$a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\frac{- (- 4 i^{1 + 1} x + 4 i \cdot 1 + 4 i (2 i) - x (5 + 3 i)) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.1.2.1.5

Add

$1$ and

$1$ .

$\frac{- (- 4 i^{2} x + 4 i \cdot 1 + 4 i (2 i) - x (5 + 3 i)) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.1.2.2

Multiply

$4$ by

$1$ .

$\frac{- (- 4 i^{2} x + 4 i + 4 i (2 i) - x (5 + 3 i)) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.1.2.3

Multiply

$4 i (2 i)$ .

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Step 4.3.1.2.3.1

Multiply

$2$ by

$4$ .

$\frac{- (- 4 i^{2} x + 4 i + 8 i i - x (5 + 3 i)) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.1.2.3.2

Raise

$i$ to the power of

$1$ .

$\frac{- (- 4 i^{2} x + 4 i + 8 (i^{1} i) - x (5 + 3 i)) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.1.2.3.3

Raise

$i$ to the power of

$1$ .

$\frac{- (- 4 i^{2} x + 4 i + 8 (i^{1} i^{1}) - x (5 + 3 i)) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.1.2.3.4

Use the power rule

$a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\frac{- (- 4 i^{2} x + 4 i + 8 i^{1 + 1} - x (5 + 3 i)) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.1.2.3.5

Add

$1$ and

$1$ .

$\frac{- (- 4 i^{2} x + 4 i + 8 i^{2} - x (5 + 3 i)) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.1.3

Simplify each term.

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Step 4.3.1.3.1

Rewrite

$i^{2}$ as

$- 1$ .

$\frac{- (- 4 \cdot - 1 x + 4 i + 8 i^{2} - x (5 + 3 i)) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.1.3.2

Multiply

$- 4$ by

$- 1$ .

$\frac{- (4 x + 4 i + 8 i^{2} - x (5 + 3 i)) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.1.3.3

Rewrite

$i^{2}$ as

$- 1$ .

$\frac{- (4 x + 4 i + 8 \cdot - 1 - x (5 + 3 i)) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.1.3.4

Multiply

$8$ by

$- 1$ .

$\frac{- (4 x + 4 i - 8 - x (5 + 3 i)) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.1.4

Apply the distributive property.

$\frac{- (4 x + 4 i - 8 - x \cdot 5 - x (3 i)) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.1.5

Multiply

$5$ by

$- 1$ .

$\frac{- (4 x + 4 i - 8 - 5 x - x (3 i)) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.1.6

Multiply

$3$ by

$- 1$ .

$\frac{- (4 x + 4 i - 8 - 5 x - 3 x i) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.2

Subtract

$5 x$ from

$4 x$ .

$\frac{- (- x + 4 i - 8 - 3 x i) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.3

Apply the distributive property.

$\frac{- - x - (4 i) - - 8 - (- 3 x i) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.4

Simplify.

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Step 4.3.4.1

Multiply

$- - x$ .

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Step 4.3.4.1.1

Multiply

$- 1$ by

$- 1$ .

$\frac{1 x - (4 i) - - 8 - (- 3 x i) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.4.1.2

Multiply

$x$ by

$1$ .

$\frac{x - (4 i) - - 8 - (- 3 x i) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.4.2

Multiply

$4$ by

$- 1$ .

$\frac{x - 4 i - - 8 - (- 3 x i) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.4.3

Multiply

$- 1$ by

$- 8$ .

$\frac{x - 4 i + 8 - (- 3 x i) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.4.4

Multiply

$- 3$ by

$- 1$ .

$\frac{x - 4 i + 8 + 3 (x i) + (- x - 1 + 4 i) (1 + 2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.5

Expand

$(- x - 1 + 4 i) (1 + 2 i)$ by multiplying each term in the first expression by each term in the second expression.

$\frac{x - 4 i + 8 + 3 x i - x \cdot 1 - x (2 i) - 1 \cdot 1 - 1 (2 i) + 4 i \cdot 1 + 4 i (2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.6

Simplify each term.

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Step 4.3.6.1

Multiply

$- 1$ by

$1$ .

$\frac{x - 4 i + 8 + 3 x i - x - x (2 i) - 1 \cdot 1 - 1 (2 i) + 4 i \cdot 1 + 4 i (2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.6.2

Multiply

$2$ by

$- 1$ .

$\frac{x - 4 i + 8 + 3 x i - x - 2 x i - 1 \cdot 1 - 1 (2 i) + 4 i \cdot 1 + 4 i (2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.6.3

Multiply

$- 1$ by

$1$ .

$\frac{x - 4 i + 8 + 3 x i - x - 2 x i - 1 - 1 (2 i) + 4 i \cdot 1 + 4 i (2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.6.4

Multiply

$2$ by

$- 1$ .

$\frac{x - 4 i + 8 + 3 x i - x - 2 x i - 1 - 2 i + 4 i \cdot 1 + 4 i (2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.6.5

Multiply

$4$ by

$1$ .

$\frac{x - 4 i + 8 + 3 x i - x - 2 x i - 1 - 2 i + 4 i + 4 i (2 i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.6.6

Multiply

$4 i (2 i)$ .

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Step 4.3.6.6.1

Multiply

$2$ by

$4$ .

$\frac{x - 4 i + 8 + 3 x i - x - 2 x i - 1 - 2 i + 4 i + 8 i i - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.6.6.2

Raise

$i$ to the power of

$1$ .

$\frac{x - 4 i + 8 + 3 x i - x - 2 x i - 1 - 2 i + 4 i + 8 (i^{1} i) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.6.6.3

Raise

$i$ to the power of

$1$ .

$\frac{x - 4 i + 8 + 3 x i - x - 2 x i - 1 - 2 i + 4 i + 8 (i^{1} i^{1}) - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.6.6.4

Use the power rule

$a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\frac{x - 4 i + 8 + 3 x i - x - 2 x i - 1 - 2 i + 4 i + 8 i^{1 + 1} - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.6.6.5

Add

$1$ and

$1$ .

$\frac{x - 4 i + 8 + 3 x i - x - 2 x i - 1 - 2 i + 4 i + 8 i^{2} - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.6.7

Rewrite

$i^{2}$ as

$- 1$ .

$\frac{x - 4 i + 8 + 3 x i - x - 2 x i - 1 - 2 i + 4 i + 8 \cdot - 1 - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.6.8

Multiply

$8$ by

$- 1$ .

$\frac{x - 4 i + 8 + 3 x i - x - 2 x i - 1 - 2 i + 4 i - 8 - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.7

Subtract

$8$ from

$- 1$ .

$\frac{x - 4 i + 8 + 3 x i - x - 2 x i - 9 - 2 i + 4 i - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.3.8

Add

$- 2 i$ and

$4 i$ .

$\frac{x - 4 i + 8 + 3 x i - x - 2 x i - 9 + 2 i - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.4

Combine the opposite terms in

$x - 4 i + 8 + 3 x i - x - 2 x i - 9 + 2 i - i x + 1 + 2 i$ .

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Step 4.4.1

Subtract

$x$ from

$x$ .

$\frac{0 - 4 i + 8 + 3 x i - 2 x i - 9 + 2 i - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.4.2

Subtract

$4 i$ from

$0$ .

$\frac{- 4 i + 8 + 3 x i - 2 x i - 9 + 2 i - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.5

Add

$- 4 i$ and

$2 i$ .

$\frac{8 + 3 x i - 2 x i - 9 - 2 i - i x + 1 + 2 i}{i x - 1 - 2 i} = 0$

Step 4.6

Combine the opposite terms in

$8 + 3 x i - 2 x i - 9 - 2 i - i x + 1 + 2 i$ .

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Step 4.6.1

Add

$- 2 i$ and

$2 i$ .

$\frac{8 + 3 x i - 2 x i - 9 - i x + 1 + 0}{i x - 1 - 2 i} = 0$

Step 4.6.2

Add

$8 + 3 x i - 2 x i - 9 - i x + 1$ and

$0$ .

$\frac{8 + 3 x i - 2 x i - 9 - i x + 1}{i x - 1 - 2 i} = 0$

Step 4.7

Subtract

$9$ from

$8$ .

$\frac{3 x i - 2 x i - 1 - i x + 1}{i x - 1 - 2 i} = 0$

Step 4.8

Combine the opposite terms in

$3 x i - 2 x i - 1 - i x + 1$ .

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Step 4.8.1

Add

$- 1$ and

$1$ .

$\frac{3 x i - 2 x i - i x + 0}{i x - 1 - 2 i} = 0$

Step 4.8.2

Add

$3 x i - 2 x i - i x$ and

$0$ .

$\frac{3 x i - 2 x i - i x}{i x - 1 - 2 i} = 0$

Step 4.9

Subtract

$2 x i$ from

$3 x i$ .

$\frac{1 x i - i x}{i x - 1 - 2 i} = 0$

Step 4.10

Multiply

$x$ by

$1$ .

$\frac{x i - i x}{i x - 1 - 2 i} = 0$

Step 4.11

Combine the opposite terms in

$x i - i x$ .

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Step 4.11.1

Reorder the factors in the terms

$x i$ and

$- i x$ .

$\frac{i x - i x}{i x - 1 - 2 i} = 0$

Step 4.11.2

Subtract

$i x$ from

$i x$ .

$\frac{0}{i x - 1 - 2 i} = 0$

Step 4.12

Divide

$0$ by

$i x - 1 - 2 i$ .

$0 = 0$

Step 5

Since

$0 = 0$ , the equation will always be true.

Always true