Algebra Examples

$(2 x^{2} - 5 x + 6) \cdot (3 x^{4} - 5 x^{3} - 6 x^{2} + 4 x - 3)$

Step 1

Expand $(2 x^{2} - 5 x + 6) (3 x^{4} - 5 x^{3} - 6 x^{2} + 4 x - 3)$ by multiplying each term in the first expression by each term in the second expression.

$2 x^{2} (3 x^{4}) + 2 x^{2} (- 5 x^{3}) + 2 x^{2} (- 6 x^{2}) + 2 x^{2} (4 x) + 2 x^{2} \cdot - 3 - 5 x (3 x^{4}) - 5 x (- 5 x^{3}) - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2

Simplify terms.

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Step 2.1

Simplify each term.

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Step 2.1.1

Rewrite using the commutative property of multiplication.

$2 \cdot 3 x^{2} x^{4} + 2 x^{2} (- 5 x^{3}) + 2 x^{2} (- 6 x^{2}) + 2 x^{2} (4 x) + 2 x^{2} \cdot - 3 - 5 x (3 x^{4}) - 5 x (- 5 x^{3}) - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.2

Multiply $x^{2}$ by $x^{4}$ by adding the exponents.

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Step 2.1.2.1

Move $x^{4}$ .

$2 \cdot 3 (x^{4} x^{2}) + 2 x^{2} (- 5 x^{3}) + 2 x^{2} (- 6 x^{2}) + 2 x^{2} (4 x) + 2 x^{2} \cdot - 3 - 5 x (3 x^{4}) - 5 x (- 5 x^{3}) - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.2.2

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

$2 \cdot 3 x^{4 + 2} + 2 x^{2} (- 5 x^{3}) + 2 x^{2} (- 6 x^{2}) + 2 x^{2} (4 x) + 2 x^{2} \cdot - 3 - 5 x (3 x^{4}) - 5 x (- 5 x^{3}) - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.2.3

Add $4$ and $2$ .

$2 \cdot 3 x^{6} + 2 x^{2} (- 5 x^{3}) + 2 x^{2} (- 6 x^{2}) + 2 x^{2} (4 x) + 2 x^{2} \cdot - 3 - 5 x (3 x^{4}) - 5 x (- 5 x^{3}) - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.3

Multiply $2$ by $3$ .

$6 x^{6} + 2 x^{2} (- 5 x^{3}) + 2 x^{2} (- 6 x^{2}) + 2 x^{2} (4 x) + 2 x^{2} \cdot - 3 - 5 x (3 x^{4}) - 5 x (- 5 x^{3}) - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.4

Rewrite using the commutative property of multiplication.

$6 x^{6} + 2 \cdot - 5 x^{2} x^{3} + 2 x^{2} (- 6 x^{2}) + 2 x^{2} (4 x) + 2 x^{2} \cdot - 3 - 5 x (3 x^{4}) - 5 x (- 5 x^{3}) - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.5

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

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Step 2.1.5.1

Move $x^{3}$ .

$6 x^{6} + 2 \cdot - 5 (x^{3} x^{2}) + 2 x^{2} (- 6 x^{2}) + 2 x^{2} (4 x) + 2 x^{2} \cdot - 3 - 5 x (3 x^{4}) - 5 x (- 5 x^{3}) - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.5.2

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

$6 x^{6} + 2 \cdot - 5 x^{3 + 2} + 2 x^{2} (- 6 x^{2}) + 2 x^{2} (4 x) + 2 x^{2} \cdot - 3 - 5 x (3 x^{4}) - 5 x (- 5 x^{3}) - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.5.3

Add $3$ and $2$ .

$6 x^{6} + 2 \cdot - 5 x^{5} + 2 x^{2} (- 6 x^{2}) + 2 x^{2} (4 x) + 2 x^{2} \cdot - 3 - 5 x (3 x^{4}) - 5 x (- 5 x^{3}) - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.6

Multiply $2$ by $- 5$ .

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

Step 2.1.7

Rewrite using the commutative property of multiplication.

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

Step 2.1.8

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

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Step 2.1.8.1

Move $x^{2}$ .

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

Step 2.1.8.2

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

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

Step 2.1.8.3

Add $2$ and $2$ .

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

Step 2.1.9

Multiply $2$ by $- 6$ .

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

Step 2.1.10

Rewrite using the commutative property of multiplication.

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

Step 2.1.11

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

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Step 2.1.11.1

Move $x$ .

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

Step 2.1.11.2

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

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Step 2.1.11.2.1

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

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

Step 2.1.11.2.2

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

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

Step 2.1.11.3

Add $1$ and $2$ .

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

Step 2.1.12

Multiply $2$ by $4$ .

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} + 2 x^{2} \cdot - 3 - 5 x (3 x^{4}) - 5 x (- 5 x^{3}) - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.13

Multiply $- 3$ by $2$ .

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 5 x (3 x^{4}) - 5 x (- 5 x^{3}) - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.14

Rewrite using the commutative property of multiplication.

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 5 \cdot 3 x \cdot x^{4} - 5 x (- 5 x^{3}) - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.15

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

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Step 2.1.15.1

Move $x^{4}$ .

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 5 \cdot 3 (x^{4} x) - 5 x (- 5 x^{3}) - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.15.2

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

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Step 2.1.15.2.1

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

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 5 \cdot 3 (x^{4} x^{1}) - 5 x (- 5 x^{3}) - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.15.2.2

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

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 5 \cdot 3 x^{4 + 1} - 5 x (- 5 x^{3}) - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.15.3

Add $4$ and $1$ .

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 5 \cdot 3 x^{5} - 5 x (- 5 x^{3}) - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.16

Multiply $- 5$ by $3$ .

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} - 5 x (- 5 x^{3}) - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.17

Rewrite using the commutative property of multiplication.

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} - 5 \cdot - 5 x \cdot x^{3} - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.18

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

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Step 2.1.18.1

Move $x^{3}$ .

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} - 5 \cdot - 5 (x^{3} x) - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.18.2

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

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Step 2.1.18.2.1

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

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} - 5 \cdot - 5 (x^{3} x^{1}) - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.18.2.2

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

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} - 5 \cdot - 5 x^{3 + 1} - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.18.3

Add $3$ and $1$ .

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} - 5 \cdot - 5 x^{4} - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.19

Multiply $- 5$ by $- 5$ .

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} + 25 x^{4} - 5 x (- 6 x^{2}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.20

Rewrite using the commutative property of multiplication.

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} + 25 x^{4} - 5 \cdot - 6 x \cdot x^{2} - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.21

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

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Step 2.1.21.1

Move $x^{2}$ .

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} + 25 x^{4} - 5 \cdot - 6 (x^{2} x) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.21.2

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

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Step 2.1.21.2.1

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

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} + 25 x^{4} - 5 \cdot - 6 (x^{2} x^{1}) - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.21.2.2

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

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} + 25 x^{4} - 5 \cdot - 6 x^{2 + 1} - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.21.3

Add $2$ and $1$ .

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} + 25 x^{4} - 5 \cdot - 6 x^{3} - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.22

Multiply $- 5$ by $- 6$ .

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} + 25 x^{4} + 30 x^{3} - 5 x (4 x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.23

Rewrite using the commutative property of multiplication.

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} + 25 x^{4} + 30 x^{3} - 5 \cdot 4 x \cdot x - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.24

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

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Step 2.1.24.1

Move $x$ .

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} + 25 x^{4} + 30 x^{3} - 5 \cdot 4 (x \cdot x) - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.24.2

Multiply $x$ by $x$ .

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} + 25 x^{4} + 30 x^{3} - 5 \cdot 4 x^{2} - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.25

Multiply $- 5$ by $4$ .

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} + 25 x^{4} + 30 x^{3} - 20 x^{2} - 5 x \cdot - 3 + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.26

Multiply $- 3$ by $- 5$ .

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} + 25 x^{4} + 30 x^{3} - 20 x^{2} + 15 x + 6 (3 x^{4}) + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.27

Multiply $3$ by $6$ .

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} + 25 x^{4} + 30 x^{3} - 20 x^{2} + 15 x + 18 x^{4} + 6 (- 5 x^{3}) + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.28

Multiply $- 5$ by $6$ .

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} + 25 x^{4} + 30 x^{3} - 20 x^{2} + 15 x + 18 x^{4} - 30 x^{3} + 6 (- 6 x^{2}) + 6 (4 x) + 6 \cdot - 3$

Step 2.1.29

Multiply $- 6$ by $6$ .

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} + 25 x^{4} + 30 x^{3} - 20 x^{2} + 15 x + 18 x^{4} - 30 x^{3} - 36 x^{2} + 6 (4 x) + 6 \cdot - 3$

Step 2.1.30

Multiply $4$ by $6$ .

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} + 25 x^{4} + 30 x^{3} - 20 x^{2} + 15 x + 18 x^{4} - 30 x^{3} - 36 x^{2} + 24 x + 6 \cdot - 3$

Step 2.1.31

Multiply $6$ by $- 3$ .

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} + 25 x^{4} + 30 x^{3} - 20 x^{2} + 15 x + 18 x^{4} - 30 x^{3} - 36 x^{2} + 24 x - 18$

Step 2.2

Simplify by adding terms.

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Step 2.2.1

Combine the opposite terms in $6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} + 25 x^{4} + 30 x^{3} - 20 x^{2} + 15 x + 18 x^{4} - 30 x^{3} - 36 x^{2} + 24 x - 18$ .

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Step 2.2.1.1

Subtract $30 x^{3}$ from $30 x^{3}$ .

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} + 25 x^{4} - 20 x^{2} + 15 x + 18 x^{4} + 0 - 36 x^{2} + 24 x - 18$

Step 2.2.1.2

Add $6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} + 25 x^{4} - 20 x^{2} + 15 x + 18 x^{4}$ and $0$ .

$6 x^{6} - 10 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} - 15 x^{5} + 25 x^{4} - 20 x^{2} + 15 x + 18 x^{4} - 36 x^{2} + 24 x - 18$

Step 2.2.2

Subtract $15 x^{5}$ from $- 10 x^{5}$ .

$6 x^{6} - 25 x^{5} - 12 x^{4} + 8 x^{3} - 6 x^{2} + 25 x^{4} - 20 x^{2} + 15 x + 18 x^{4} - 36 x^{2} + 24 x - 18$

Step 2.2.3

Add $- 12 x^{4}$ and $25 x^{4}$ .

$6 x^{6} - 25 x^{5} + 13 x^{4} + 8 x^{3} - 6 x^{2} - 20 x^{2} + 15 x + 18 x^{4} - 36 x^{2} + 24 x - 18$

Step 2.2.4

Add $13 x^{4}$ and $18 x^{4}$ .

$6 x^{6} - 25 x^{5} + 31 x^{4} + 8 x^{3} - 6 x^{2} - 20 x^{2} + 15 x - 36 x^{2} + 24 x - 18$

Step 2.2.5

Subtract $20 x^{2}$ from $- 6 x^{2}$ .

$6 x^{6} - 25 x^{5} + 31 x^{4} + 8 x^{3} - 26 x^{2} + 15 x - 36 x^{2} + 24 x - 18$

Step 2.2.6

Subtract $36 x^{2}$ from $- 26 x^{2}$ .

$6 x^{6} - 25 x^{5} + 31 x^{4} + 8 x^{3} - 62 x^{2} + 15 x + 24 x - 18$

Step 2.2.7

Add $15 x$ and $24 x$ .

$6 x^{6} - 25 x^{5} + 31 x^{4} + 8 x^{3} - 62 x^{2} + 39 x - 18$