Precalculus Examples

$\frac{{(x + h)}^{6} - x^{6}}{h}$

Step 1

Simplify the numerator.

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Step 1.1

Rewrite ${(x + h)}^{6}$ as ${({(x + h)}^{2})}^{3}$ .

$\frac{{({(x + h)}^{2})}^{3} - x^{6}}{h}$

Step 1.2

Rewrite $x^{6}$ as ${(x^{2})}^{3}$ .

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

Step 1.3

Since both terms are perfect cubes, factor using the difference of cubes formula, $a^{3} - b^{3} = (a - b) (a^{2} + a b + b^{2})$ where $a = {(x + h)}^{2}$ and $b = x^{2}$ .

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

Step 1.4

Simplify.

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Step 1.4.1

Since both terms are perfect squares, factor using the difference of squares formula, $a^{2} - b^{2} = (a + b) (a - b)$ where $a = x + h$ and $b = x$ .

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

Step 1.4.2

Simplify.

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Step 1.4.2.1

Add $x$ and $x$ .

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

Step 1.4.2.2

Subtract $x$ from $x$ .

$\frac{(h + 2 x) (h + 0) ({({(x + h)}^{2})}^{2} + {(x + h)}^{2} x^{2} + {(x^{2})}^{2})}{h}$

Step 1.4.2.3

Add $h$ and $0$ .

$\frac{(h + 2 x) h ({({(x + h)}^{2})}^{2} + {(x + h)}^{2} x^{2} + {(x^{2})}^{2})}{h}$

Step 1.4.3

Multiply the exponents in ${({(x + h)}^{2})}^{2}$ .

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Step 1.4.3.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$\frac{(h + 2 x) h ({(x + h)}^{2 \cdot 2} + {(x + h)}^{2} x^{2} + {(x^{2})}^{2})}{h}$

Step 1.4.3.2

Multiply $2$ by $2$ .

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

Step 1.4.4

Use the Binomial Theorem.

$\frac{(h + 2 x) h (x^{4} + 4 x^{3} h + 6 x^{2} h^{2} + 4 x h^{3} + h^{4} + {(x + h)}^{2} x^{2} + {(x^{2})}^{2})}{h}$

Step 1.4.5

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

$\frac{(h + 2 x) h (x^{4} + 4 x^{3} h + 6 x^{2} h^{2} + 4 x h^{3} + h^{4} + (x + h) (x + h) x^{2} + {(x^{2})}^{2})}{h}$

Step 1.4.6

Expand $(x + h) (x + h)$ using the FOIL Method.

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Step 1.4.6.1

Apply the distributive property.

$\frac{(h + 2 x) h (x^{4} + 4 x^{3} h + 6 x^{2} h^{2} + 4 x h^{3} + h^{4} + (x (x + h) + h (x + h)) x^{2} + {(x^{2})}^{2})}{h}$

Step 1.4.6.2

Apply the distributive property.

$\frac{(h + 2 x) h (x^{4} + 4 x^{3} h + 6 x^{2} h^{2} + 4 x h^{3} + h^{4} + (x \cdot x + x h + h (x + h)) x^{2} + {(x^{2})}^{2})}{h}$

Step 1.4.6.3

Apply the distributive property.

$\frac{(h + 2 x) h (x^{4} + 4 x^{3} h + 6 x^{2} h^{2} + 4 x h^{3} + h^{4} + (x \cdot x + x h + h x + h \cdot h) x^{2} + {(x^{2})}^{2})}{h}$

Step 1.4.7

Simplify and combine like terms.

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Step 1.4.7.1

Simplify each term.

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Step 1.4.7.1.1

Multiply $x$ by $x$ .

$\frac{(h + 2 x) h (x^{4} + 4 x^{3} h + 6 x^{2} h^{2} + 4 x h^{3} + h^{4} + (x^{2} + x h + h x + h \cdot h) x^{2} + {(x^{2})}^{2})}{h}$

Step 1.4.7.1.2

Multiply $h$ by $h$ .

$\frac{(h + 2 x) h (x^{4} + 4 x^{3} h + 6 x^{2} h^{2} + 4 x h^{3} + h^{4} + (x^{2} + x h + h x + h^{2}) x^{2} + {(x^{2})}^{2})}{h}$

Step 1.4.7.2

Add $x h$ and $h x$ .

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Step 1.4.7.2.1

Reorder $x$ and $h$ .

$\frac{(h + 2 x) h (x^{4} + 4 x^{3} h + 6 x^{2} h^{2} + 4 x h^{3} + h^{4} + (x^{2} + h x + h x + h^{2}) x^{2} + {(x^{2})}^{2})}{h}$

Step 1.4.7.2.2

Add $h x$ and $h x$ .

$\frac{(h + 2 x) h (x^{4} + 4 x^{3} h + 6 x^{2} h^{2} + 4 x h^{3} + h^{4} + (x^{2} + 2 h x + h^{2}) x^{2} + {(x^{2})}^{2})}{h}$

Step 1.4.8

Apply the distributive property.

$\frac{(h + 2 x) h (x^{4} + 4 x^{3} h + 6 x^{2} h^{2} + 4 x h^{3} + h^{4} + x^{2} x^{2} + 2 h x \cdot x^{2} + h^{2} x^{2} + {(x^{2})}^{2})}{h}$

Step 1.4.9

Simplify.

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Step 1.4.9.1

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

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Step 1.4.9.1.1

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

$\frac{(h + 2 x) h (x^{4} + 4 x^{3} h + 6 x^{2} h^{2} + 4 x h^{3} + h^{4} + x^{2 + 2} + 2 h x \cdot x^{2} + h^{2} x^{2} + {(x^{2})}^{2})}{h}$

Step 1.4.9.1.2

Add $2$ and $2$ .

$\frac{(h + 2 x) h (x^{4} + 4 x^{3} h + 6 x^{2} h^{2} + 4 x h^{3} + h^{4} + x^{4} + 2 h x \cdot x^{2} + h^{2} x^{2} + {(x^{2})}^{2})}{h}$

Step 1.4.9.2

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

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Step 1.4.9.2.1

Move $x^{2}$ .

$\frac{(h + 2 x) h (x^{4} + 4 x^{3} h + 6 x^{2} h^{2} + 4 x h^{3} + h^{4} + x^{4} + 2 h (x^{2} x) + h^{2} x^{2} + {(x^{2})}^{2})}{h}$

Step 1.4.9.2.2

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

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Step 1.4.9.2.2.1

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

$\frac{(h + 2 x) h (x^{4} + 4 x^{3} h + 6 x^{2} h^{2} + 4 x h^{3} + h^{4} + x^{4} + 2 h (x^{2} x^{1}) + h^{2} x^{2} + {(x^{2})}^{2})}{h}$

Step 1.4.9.2.2.2

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

$\frac{(h + 2 x) h (x^{4} + 4 x^{3} h + 6 x^{2} h^{2} + 4 x h^{3} + h^{4} + x^{4} + 2 h x^{2 + 1} + h^{2} x^{2} + {(x^{2})}^{2})}{h}$

Step 1.4.9.2.3

Add $2$ and $1$ .

$\frac{(h + 2 x) h (x^{4} + 4 x^{3} h + 6 x^{2} h^{2} + 4 x h^{3} + h^{4} + x^{4} + 2 h x^{3} + h^{2} x^{2} + {(x^{2})}^{2})}{h}$

Step 1.4.10

Multiply the exponents in ${(x^{2})}^{2}$ .

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Step 1.4.10.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$\frac{(h + 2 x) h (x^{4} + 4 x^{3} h + 6 x^{2} h^{2} + 4 x h^{3} + h^{4} + x^{4} + 2 h x^{3} + h^{2} x^{2} + x^{2 \cdot 2})}{h}$

Step 1.4.10.2

Multiply $2$ by $2$ .

$\frac{(h + 2 x) h (x^{4} + 4 x^{3} h + 6 x^{2} h^{2} + 4 x h^{3} + h^{4} + x^{4} + 2 h x^{3} + h^{2} x^{2} + x^{4})}{h}$

Step 1.4.11

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

$\frac{(h + 2 x) h (2 x^{4} + 4 x^{3} h + 6 x^{2} h^{2} + 4 x h^{3} + h^{4} + 2 h x^{3} + h^{2} x^{2} + x^{4})}{h}$

Step 1.4.12

Add $2 x^{4}$ and $x^{4}$ .

$\frac{(h + 2 x) h (3 x^{4} + 4 x^{3} h + 6 x^{2} h^{2} + 4 x h^{3} + h^{4} + 2 h x^{3} + h^{2} x^{2})}{h}$

Step 1.4.13

Add $4 x^{3} h$ and $2 h x^{3}$ .

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Step 1.4.13.1

Move $x^{3}$ .

$\frac{(h + 2 x) h (3 x^{4} + 6 x^{2} h^{2} + 4 x h^{3} + h^{4} + 4 h x^{3} + 2 h x^{3} + h^{2} x^{2})}{h}$

Step 1.4.13.2

Add $4 h x^{3}$ and $2 h x^{3}$ .

$\frac{(h + 2 x) h (3 x^{4} + 6 x^{2} h^{2} + 4 x h^{3} + h^{4} + 6 h x^{3} + h^{2} x^{2})}{h}$

Step 1.4.14

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

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Step 1.4.14.1

Move $x^{2}$ .

$\frac{(h + 2 x) h (3 x^{4} + 4 x h^{3} + h^{4} + 6 h x^{3} + 6 h^{2} x^{2} + h^{2} x^{2})}{h}$

Step 1.4.14.2

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

$\frac{(h + 2 x) h (3 x^{4} + 4 x h^{3} + h^{4} + 6 h x^{3} + 7 h^{2} x^{2})}{h}$

Step 2

Cancel the common factor of $h$ .

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Step 2.1

Cancel the common factor.

$\frac{(h + 2 x) h (3 x^{4} + 4 x h^{3} + h^{4} + 6 h x^{3} + 7 h^{2} x^{2})}{h}$

Step 2.2

Divide $(h + 2 x) (3 x^{4} + 4 x h^{3} + h^{4} + 6 h x^{3} + 7 h^{2} x^{2})$ by $1$ .

$(h + 2 x) (3 x^{4} + 4 x h^{3} + h^{4} + 6 h x^{3} + 7 h^{2} x^{2})$

Step 3

Expand $(h + 2 x) (3 x^{4} + 4 x h^{3} + h^{4} + 6 h x^{3} + 7 h^{2} x^{2})$ by multiplying each term in the first expression by each term in the second expression.

$h (3 x^{4}) + h (4 x h^{3}) + h \cdot h^{4} + h (6 h x^{3}) + h (7 h^{2} x^{2}) + 2 x (3 x^{4}) + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4

Simplify each term.

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Step 4.1

Rewrite using the commutative property of multiplication.

$3 h x^{4} + h (4 x h^{3}) + h \cdot h^{4} + h (6 h x^{3}) + h (7 h^{2} x^{2}) + 2 x (3 x^{4}) + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.2

Rewrite using the commutative property of multiplication.

$3 h x^{4} + 4 h (x h^{3}) + h \cdot h^{4} + h (6 h x^{3}) + h (7 h^{2} x^{2}) + 2 x (3 x^{4}) + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.3

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

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Step 4.3.1

Move $h^{3}$ .

$3 h x^{4} + 4 (h^{3} h) x + h \cdot h^{4} + h (6 h x^{3}) + h (7 h^{2} x^{2}) + 2 x (3 x^{4}) + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.3.2

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

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Step 4.3.2.1

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

$3 h x^{4} + 4 (h^{3} h^{1}) x + h \cdot h^{4} + h (6 h x^{3}) + h (7 h^{2} x^{2}) + 2 x (3 x^{4}) + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.3.2.2

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

$3 h x^{4} + 4 h^{3 + 1} x + h \cdot h^{4} + h (6 h x^{3}) + h (7 h^{2} x^{2}) + 2 x (3 x^{4}) + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.3.3

Add $3$ and $1$ .

$3 h x^{4} + 4 h^{4} x + h \cdot h^{4} + h (6 h x^{3}) + h (7 h^{2} x^{2}) + 2 x (3 x^{4}) + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.4

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

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Step 4.4.1

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

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Step 4.4.1.1

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

$3 h x^{4} + 4 h^{4} x + h^{1} h^{4} + h (6 h x^{3}) + h (7 h^{2} x^{2}) + 2 x (3 x^{4}) + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.4.1.2

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

$3 h x^{4} + 4 h^{4} x + h^{1 + 4} + h (6 h x^{3}) + h (7 h^{2} x^{2}) + 2 x (3 x^{4}) + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.4.2

Add $1$ and $4$ .

$3 h x^{4} + 4 h^{4} x + h^{5} + h (6 h x^{3}) + h (7 h^{2} x^{2}) + 2 x (3 x^{4}) + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.5

Rewrite using the commutative property of multiplication.

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h (h x^{3}) + h (7 h^{2} x^{2}) + 2 x (3 x^{4}) + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.6

Multiply $h$ by $h$ by adding the exponents.

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Step 4.6.1

Move $h$ .

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 (h \cdot h) x^{3} + h (7 h^{2} x^{2}) + 2 x (3 x^{4}) + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.6.2

Multiply $h$ by $h$ .

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + h (7 h^{2} x^{2}) + 2 x (3 x^{4}) + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.7

Rewrite using the commutative property of multiplication.

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h (h^{2} x^{2}) + 2 x (3 x^{4}) + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.8

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

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Step 4.8.1

Move $h^{2}$ .

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 (h^{2} h) x^{2} + 2 x (3 x^{4}) + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.8.2

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

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Step 4.8.2.1

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

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 (h^{2} h^{1}) x^{2} + 2 x (3 x^{4}) + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.8.2.2

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

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{2 + 1} x^{2} + 2 x (3 x^{4}) + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.8.3

Add $2$ and $1$ .

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 2 x (3 x^{4}) + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.9

Rewrite using the commutative property of multiplication.

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 2 \cdot 3 x \cdot x^{4} + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.10

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

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Step 4.10.1

Move $x^{4}$ .

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 2 \cdot 3 (x^{4} x) + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.10.2

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

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Step 4.10.2.1

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

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 2 \cdot 3 (x^{4} x^{1}) + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.10.2.2

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

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 2 \cdot 3 x^{4 + 1} + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.10.3

Add $4$ and $1$ .

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 2 \cdot 3 x^{5} + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.11

Multiply $2$ by $3$ .

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 6 x^{5} + 2 x (4 x h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.12

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

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Step 4.12.1

Move $x$ .

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 6 x^{5} + 2 (x \cdot x) (4 h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.12.2

Multiply $x$ by $x$ .

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 6 x^{5} + 2 x^{2} (4 h^{3}) + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.13

Rewrite using the commutative property of multiplication.

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 6 x^{5} + 2 \cdot 4 x^{2} h^{3} + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.14

Multiply $2$ by $4$ .

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 6 x^{5} + 8 x^{2} h^{3} + 2 x h^{4} + 2 x (6 h x^{3}) + 2 x (7 h^{2} x^{2})$

Step 4.15

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

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Step 4.15.1

Move $x^{3}$ .

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 6 x^{5} + 8 x^{2} h^{3} + 2 x h^{4} + 2 (x^{3} x) (6 h) + 2 x (7 h^{2} x^{2})$

Step 4.15.2

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

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Step 4.15.2.1

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

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 6 x^{5} + 8 x^{2} h^{3} + 2 x h^{4} + 2 (x^{3} x^{1}) (6 h) + 2 x (7 h^{2} x^{2})$

Step 4.15.2.2

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

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 6 x^{5} + 8 x^{2} h^{3} + 2 x h^{4} + 2 x^{3 + 1} (6 h) + 2 x (7 h^{2} x^{2})$

Step 4.15.3

Add $3$ and $1$ .

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 6 x^{5} + 8 x^{2} h^{3} + 2 x h^{4} + 2 x^{4} (6 h) + 2 x (7 h^{2} x^{2})$

Step 4.16

Rewrite using the commutative property of multiplication.

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 6 x^{5} + 8 x^{2} h^{3} + 2 x h^{4} + 2 \cdot 6 x^{4} h + 2 x (7 h^{2} x^{2})$

Step 4.17

Multiply $2$ by $6$ .

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 6 x^{5} + 8 x^{2} h^{3} + 2 x h^{4} + 12 x^{4} h + 2 x (7 h^{2} x^{2})$

Step 4.18

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

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Step 4.18.1

Move $x^{2}$ .

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 6 x^{5} + 8 x^{2} h^{3} + 2 x h^{4} + 12 x^{4} h + 2 (x^{2} x) (7 h^{2})$

Step 4.18.2

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

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Step 4.18.2.1

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

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 6 x^{5} + 8 x^{2} h^{3} + 2 x h^{4} + 12 x^{4} h + 2 (x^{2} x^{1}) (7 h^{2})$

Step 4.18.2.2

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

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 6 x^{5} + 8 x^{2} h^{3} + 2 x h^{4} + 12 x^{4} h + 2 x^{2 + 1} (7 h^{2})$

Step 4.18.3

Add $2$ and $1$ .

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 6 x^{5} + 8 x^{2} h^{3} + 2 x h^{4} + 12 x^{4} h + 2 x^{3} (7 h^{2})$

Step 4.19

Rewrite using the commutative property of multiplication.

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 6 x^{5} + 8 x^{2} h^{3} + 2 x h^{4} + 12 x^{4} h + 2 \cdot 7 x^{3} h^{2}$

Step 4.20

Multiply $2$ by $7$ .

$3 h x^{4} + 4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 6 x^{5} + 8 x^{2} h^{3} + 2 x h^{4} + 12 x^{4} h + 14 x^{3} h^{2}$

Step 5

Add $3 h x^{4}$ and $12 x^{4} h$ .

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Step 5.1

Move $x^{4}$ .

$4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 6 x^{5} + 8 x^{2} h^{3} + 2 x h^{4} + 3 h x^{4} + 12 h x^{4} + 14 x^{3} h^{2}$

Step 5.2

Add $3 h x^{4}$ and $12 h x^{4}$ .

$4 h^{4} x + h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 6 x^{5} + 8 x^{2} h^{3} + 2 x h^{4} + 15 h x^{4} + 14 x^{3} h^{2}$

Step 6

Add $4 h^{4} x$ and $2 x h^{4}$ .

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Step 6.1

Move $x$ .

$h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 6 x^{5} + 8 x^{2} h^{3} + 4 h^{4} x + 2 h^{4} x + 15 h x^{4} + 14 x^{3} h^{2}$

Step 6.2

Add $4 h^{4} x$ and $2 h^{4} x$ .

$h^{5} + 6 h^{2} x^{3} + 7 h^{3} x^{2} + 6 x^{5} + 8 x^{2} h^{3} + 6 h^{4} x + 15 h x^{4} + 14 x^{3} h^{2}$

Step 7

Add $6 h^{2} x^{3}$ and $14 x^{3} h^{2}$ .

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Step 7.1

Move $x^{3}$ .

$h^{5} + 7 h^{3} x^{2} + 6 x^{5} + 8 x^{2} h^{3} + 6 h^{4} x + 15 h x^{4} + 6 h^{2} x^{3} + 14 h^{2} x^{3}$

Step 7.2

Add $6 h^{2} x^{3}$ and $14 h^{2} x^{3}$ .

$h^{5} + 7 h^{3} x^{2} + 6 x^{5} + 8 x^{2} h^{3} + 6 h^{4} x + 15 h x^{4} + 20 h^{2} x^{3}$

Step 8

Add $7 h^{3} x^{2}$ and $8 x^{2} h^{3}$ .

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Step 8.1

Move $x^{2}$ .

$h^{5} + 6 x^{5} + 7 h^{3} x^{2} + 8 h^{3} x^{2} + 6 h^{4} x + 15 h x^{4} + 20 h^{2} x^{3}$

Step 8.2

Add $7 h^{3} x^{2}$ and $8 h^{3} x^{2}$ .

$h^{5} + 6 x^{5} + 15 h^{3} x^{2} + 6 h^{4} x + 15 h x^{4} + 20 h^{2} x^{3}$