Chemistry Examples

$(x - 3 - i) (x - 3 + i) (x - 4 i) (x + 4 i)$

Step 1

Expand $(x - 3 - i) (x - 3 + i)$ by multiplying each term in the first expression by each term in the second expression.

$(x \cdot x + x \cdot - 3 + x i - 3 x - 3 \cdot - 3 - 3 i - i x - i \cdot - 3 - i i) (x - 4 i) (x + 4 i)$

Step 2

Simplify terms.

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Step 2.1

Combine the opposite terms in $x \cdot x + x \cdot - 3 + x i - 3 x - 3 \cdot - 3 - 3 i - i x - i \cdot - 3 - i i$ .

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Step 2.1.1

Reorder the factors in the terms $x i$ and $- i x$ .

$(x \cdot x + x \cdot - 3 + i x - 3 x - 3 \cdot - 3 - 3 i - i x - i \cdot - 3 - i i) (x - 4 i) (x + 4 i)$

Step 2.1.2

Subtract $i x$ from $i x$ .

$(x \cdot x + x \cdot - 3 + 0 - 3 x - 3 \cdot - 3 - 3 i - i \cdot - 3 - i i) (x - 4 i) (x + 4 i)$

Step 2.1.3

Add $x \cdot x + x \cdot - 3$ and $0$ .

$(x \cdot x + x \cdot - 3 - 3 x - 3 \cdot - 3 - 3 i - i \cdot - 3 - i i) (x - 4 i) (x + 4 i)$

Step 2.2

Simplify each term.

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Step 2.2.1

Multiply $x$ by $x$ .

$(x^{2} + x \cdot - 3 - 3 x - 3 \cdot - 3 - 3 i - i \cdot - 3 - i i) (x - 4 i) (x + 4 i)$

Step 2.2.2

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

$(x^{2} - 3 \cdot x - 3 x - 3 \cdot - 3 - 3 i - i \cdot - 3 - i i) (x - 4 i) (x + 4 i)$

Step 2.2.3

Multiply $- 3$ by $- 3$ .

$(x^{2} - 3 x - 3 x + 9 - 3 i - i \cdot - 3 - i i) (x - 4 i) (x + 4 i)$

Step 2.2.4

Multiply $- 3$ by $- 1$ .

$(x^{2} - 3 x - 3 x + 9 - 3 i + 3 i - i i) (x - 4 i) (x + 4 i)$

Step 2.2.5

Multiply $- i i$ .

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Step 2.2.5.1

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

$(x^{2} - 3 x - 3 x + 9 - 3 i + 3 i - (i^{1} i)) (x - 4 i) (x + 4 i)$

Step 2.2.5.2

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

$(x^{2} - 3 x - 3 x + 9 - 3 i + 3 i - (i^{1} i^{1})) (x - 4 i) (x + 4 i)$

Step 2.2.5.3

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

$(x^{2} - 3 x - 3 x + 9 - 3 i + 3 i - i^{1 + 1}) (x - 4 i) (x + 4 i)$

Step 2.2.5.4

Add $1$ and $1$ .

$(x^{2} - 3 x - 3 x + 9 - 3 i + 3 i - i^{2}) (x - 4 i) (x + 4 i)$

Step 2.2.6

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

$(x^{2} - 3 x - 3 x + 9 - 3 i + 3 i - - 1) (x - 4 i) (x + 4 i)$

Step 2.2.7

Multiply $- 1$ by $- 1$ .

$(x^{2} - 3 x - 3 x + 9 - 3 i + 3 i + 1) (x - 4 i) (x + 4 i)$

Step 2.3

Simplify by adding terms.

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Step 2.3.1

Combine the opposite terms in $x^{2} - 3 x - 3 x + 9 - 3 i + 3 i + 1$ .

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Step 2.3.1.1

Add $- 3 i$ and $3 i$ .

$(x^{2} - 3 x - 3 x + 9 + 0 + 1) (x - 4 i) (x + 4 i)$

Step 2.3.1.2

Add $x^{2} - 3 x - 3 x + 9$ and $0$ .

$(x^{2} - 3 x - 3 x + 9 + 1) (x - 4 i) (x + 4 i)$

Step 2.3.2

Subtract $3 x$ from $- 3 x$ .

$(x^{2} - 6 x + 9 + 1) (x - 4 i) (x + 4 i)$

Step 2.3.3

Add $9$ and $1$ .

$(x^{2} - 6 x + 10) (x - 4 i) (x + 4 i)$

Step 3

Expand $(x^{2} - 6 x + 10) (x - 4 i)$ by multiplying each term in the first expression by each term in the second expression.

$(x^{2} x + x^{2} (- 4 i) - 6 x \cdot x - 6 x (- 4 i) + 10 x + 10 (- 4 i)) (x + 4 i)$

Step 4

Simplify each term.

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Step 4.1

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

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Step 4.1.1

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

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Step 4.1.1.1

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

$(x^{2} x^{1} + x^{2} (- 4 i) - 6 x \cdot x - 6 x (- 4 i) + 10 x + 10 (- 4 i)) (x + 4 i)$

Step 4.1.1.2

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

$(x^{2 + 1} + x^{2} (- 4 i) - 6 x \cdot x - 6 x (- 4 i) + 10 x + 10 (- 4 i)) (x + 4 i)$

Step 4.1.2

Add $2$ and $1$ .

$(x^{3} + x^{2} (- 4 i) - 6 x \cdot x - 6 x (- 4 i) + 10 x + 10 (- 4 i)) (x + 4 i)$

Step 4.2

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

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Step 4.2.1

Move $x$ .

$(x^{3} + x^{2} (- 4 i) - 6 (x \cdot x) - 6 x (- 4 i) + 10 x + 10 (- 4 i)) (x + 4 i)$

Step 4.2.2

Multiply $x$ by $x$ .

$(x^{3} + x^{2} (- 4 i) - 6 x^{2} - 6 x (- 4 i) + 10 x + 10 (- 4 i)) (x + 4 i)$

Step 4.3

Multiply $- 4$ by $- 6$ .

$(x^{3} + x^{2} (- 4 i) - 6 x^{2} + 24 x i + 10 x + 10 (- 4 i)) (x + 4 i)$

Step 4.4

Multiply $- 4$ by $10$ .

$(x^{3} + x^{2} (- 4 i) - 6 x^{2} + 24 x i + 10 x - 40 i) (x + 4 i)$

Step 5

Expand $(x^{3} + x^{2} (- 4 i) - 6 x^{2} + 24 x i + 10 x - 40 i) (x + 4 i)$ by multiplying each term in the first expression by each term in the second expression.

$x^{3} x + x^{3} (4 i) + x^{2} (- 4 i) x + x^{2} (- 4 i) (4 i) - 6 x^{2} x - 6 x^{2} (4 i) + 24 x i x + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6

Simplify terms.

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Step 6.1

Simplify each term.

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Step 6.1.1

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

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Step 6.1.1.1

Multiply $x^{3}$ by $x$ .

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Step 6.1.1.1.1

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

$x^{3} x^{1} + x^{3} (4 i) + x^{2} (- 4 i) x + x^{2} (- 4 i) (4 i) - 6 x^{2} x - 6 x^{2} (4 i) + 24 x i x + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.1.1.2

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

$x^{3 + 1} + x^{3} (4 i) + x^{2} (- 4 i) x + x^{2} (- 4 i) (4 i) - 6 x^{2} x - 6 x^{2} (4 i) + 24 x i x + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.1.2

Add $3$ and $1$ .

$x^{4} + x^{3} (4 i) + x^{2} (- 4 i) x + x^{2} (- 4 i) (4 i) - 6 x^{2} x - 6 x^{2} (4 i) + 24 x i x + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.2

Move $4$ to the left of $x^{3}$ .

$x^{4} + 4 \cdot x^{3} i + x^{2} (- 4 i) x + x^{2} (- 4 i) (4 i) - 6 x^{2} x - 6 x^{2} (4 i) + 24 x i x + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.3

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

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Step 6.1.3.1

Move $x$ .

$x^{4} + 4 x^{3} i + x \cdot x^{2} (- 4 i) + x^{2} (- 4 i) (4 i) - 6 x^{2} x - 6 x^{2} (4 i) + 24 x i x + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.3.2

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

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Step 6.1.3.2.1

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

$x^{4} + 4 x^{3} i + x^{1} x^{2} (- 4 i) + x^{2} (- 4 i) (4 i) - 6 x^{2} x - 6 x^{2} (4 i) + 24 x i x + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.3.2.2

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

$x^{4} + 4 x^{3} i + x^{1 + 2} (- 4 i) + x^{2} (- 4 i) (4 i) - 6 x^{2} x - 6 x^{2} (4 i) + 24 x i x + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.3.3

Add $1$ and $2$ .

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + x^{2} (- 4 i) (4 i) - 6 x^{2} x - 6 x^{2} (4 i) + 24 x i x + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.4

Multiply $x^{2} (- 4 i) (4 i)$ .

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Step 6.1.4.1

Multiply $4$ by $- 4$ .

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + x^{2} (- 16 i) i - 6 x^{2} x - 6 x^{2} (4 i) + 24 x i x + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.4.2

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

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + x^{2} (- 16 (i^{1} i)) - 6 x^{2} x - 6 x^{2} (4 i) + 24 x i x + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.4.3

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

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + x^{2} (- 16 (i^{1} i^{1})) - 6 x^{2} x - 6 x^{2} (4 i) + 24 x i x + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.4.4

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

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + x^{2} (- 16 i^{1 + 1}) - 6 x^{2} x - 6 x^{2} (4 i) + 24 x i x + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.4.5

Add $1$ and $1$ .

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + x^{2} (- 16 i^{2}) - 6 x^{2} x - 6 x^{2} (4 i) + 24 x i x + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.5

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

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + x^{2} (- 16 \cdot - 1) - 6 x^{2} x - 6 x^{2} (4 i) + 24 x i x + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.6

Multiply $- 16$ by $- 1$ .

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + x^{2} \cdot 16 - 6 x^{2} x - 6 x^{2} (4 i) + 24 x i x + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.7

Move $16$ to the left of $x^{2}$ .

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 \cdot x^{2} - 6 x^{2} x - 6 x^{2} (4 i) + 24 x i x + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.8

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

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Step 6.1.8.1

Move $x$ .

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 (x \cdot x^{2}) - 6 x^{2} (4 i) + 24 x i x + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.8.2

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

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Step 6.1.8.2.1

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

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 (x^{1} x^{2}) - 6 x^{2} (4 i) + 24 x i x + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.8.2.2

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

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 x^{1 + 2} - 6 x^{2} (4 i) + 24 x i x + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.8.3

Add $1$ and $2$ .

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 x^{3} - 6 x^{2} (4 i) + 24 x i x + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.9

Multiply $4$ by $- 6$ .

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 x i x + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.10

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

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Step 6.1.10.1

Move $x$ .

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 (x \cdot x) i + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.10.2

Multiply $x$ by $x$ .

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 x^{2} i + 24 x i (4 i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.11

Multiply $24 x i (4 i)$ .

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Step 6.1.11.1

Multiply $4$ by $24$ .

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 x^{2} i + 96 x i i + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.11.2

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

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 x^{2} i + 96 x (i^{1} i) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.11.3

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

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 x^{2} i + 96 x (i^{1} i^{1}) + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.11.4

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

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 x^{2} i + 96 x i^{1 + 1} + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.11.5

Add $1$ and $1$ .

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 x^{2} i + 96 x i^{2} + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.12

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

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 x^{2} i + 96 x \cdot - 1 + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.13

Multiply $- 1$ by $96$ .

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 x^{2} i - 96 x + 10 x \cdot x + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.14

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

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Step 6.1.14.1

Move $x$ .

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 x^{2} i - 96 x + 10 (x \cdot x) + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.14.2

Multiply $x$ by $x$ .

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 x^{2} i - 96 x + 10 x^{2} + 10 x (4 i) - 40 i x - 40 i (4 i)$

Step 6.1.15

Multiply $4$ by $10$ .

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 x^{2} i - 96 x + 10 x^{2} + 40 x i - 40 i x - 40 i (4 i)$

Step 6.1.16

Multiply $- 40 i (4 i)$ .

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Step 6.1.16.1

Multiply $4$ by $- 40$ .

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 x^{2} i - 96 x + 10 x^{2} + 40 x i - 40 i x - 160 i i$

Step 6.1.16.2

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

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 x^{2} i - 96 x + 10 x^{2} + 40 x i - 40 i x - 160 (i^{1} i)$

Step 6.1.16.3

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

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 x^{2} i - 96 x + 10 x^{2} + 40 x i - 40 i x - 160 (i^{1} i^{1})$

Step 6.1.16.4

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

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 x^{2} i - 96 x + 10 x^{2} + 40 x i - 40 i x - 160 i^{1 + 1}$

Step 6.1.16.5

Add $1$ and $1$ .

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 x^{2} i - 96 x + 10 x^{2} + 40 x i - 40 i x - 160 i^{2}$

Step 6.1.17

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

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 x^{2} i - 96 x + 10 x^{2} + 40 x i - 40 i x - 160 \cdot - 1$

Step 6.1.18

Multiply $- 160$ by $- 1$ .

$x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 x^{2} i - 96 x + 10 x^{2} + 40 x i - 40 i x + 160$

Step 6.2

Simplify by adding terms.

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Step 6.2.1

Combine the opposite terms in $x^{4} + 4 x^{3} i + x^{3} (- 4 i) + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 x^{2} i - 96 x + 10 x^{2} + 40 x i - 40 i x + 160$ .

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Step 6.2.1.1

Reorder the factors in the terms $4 x^{3} i$ and $x^{3} (- 4 i)$ .

$x^{4} + 4 i x^{3} - 4 i x^{3} + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 x^{2} i - 96 x + 10 x^{2} + 40 x i - 40 i x + 160$

Step 6.2.1.2

Subtract $4 i x^{3}$ from $4 i x^{3}$ .

$x^{4} + 0 + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 x^{2} i - 96 x + 10 x^{2} + 40 x i - 40 i x + 160$

Step 6.2.1.3

Add $x^{4}$ and $0$ .

$x^{4} + 16 x^{2} - 6 x^{3} - 24 x^{2} i + 24 x^{2} i - 96 x + 10 x^{2} + 40 x i - 40 i x + 160$

Step 6.2.1.4

Add $- 24 x^{2} i$ and $24 x^{2} i$ .

$x^{4} + 16 x^{2} - 6 x^{3} + 0 - 96 x + 10 x^{2} + 40 x i - 40 i x + 160$

Step 6.2.1.5

Add $x^{4} + 16 x^{2} - 6 x^{3}$ and $0$ .

$x^{4} + 16 x^{2} - 6 x^{3} - 96 x + 10 x^{2} + 40 x i - 40 i x + 160$

Step 6.2.1.6

Reorder the factors in the terms $40 x i$ and $- 40 i x$ .

$x^{4} + 16 x^{2} - 6 x^{3} - 96 x + 10 x^{2} + 40 i x - 40 i x + 160$

Step 6.2.1.7

Subtract $40 i x$ from $40 i x$ .

$x^{4} + 16 x^{2} - 6 x^{3} - 96 x + 10 x^{2} + 0 + 160$

Step 6.2.1.8

Add $x^{4} + 16 x^{2} - 6 x^{3} - 96 x + 10 x^{2}$ and $0$ .

$x^{4} + 16 x^{2} - 6 x^{3} - 96 x + 10 x^{2} + 160$

Step 6.2.2

Add $16 x^{2}$ and $10 x^{2}$ .

$x^{4} + 26 x^{2} - 6 x^{3} - 96 x + 160$

Step 6.2.3

Move $26 x^{2}$ .

$x^{4} - 6 x^{3} + 26 x^{2} - 96 x + 160$