Calculus Examples

$y = \frac{4 x^{5} + x^{2} + 4}{5 x^{2} - 2}$

Step 1

Differentiate using the Quotient Rule which states that $\frac{d}{d x} [\frac{f (x)}{g (x)}]$ is $\frac{g (x) \frac{d}{d x} [f (x)] - f (x) \frac{d}{d x} [g (x)]}{{g (x)}^{2}}$ where $f (x) = 4 x^{5} + x^{2} + 4$ and $g (x) = 5 x^{2} - 2$ .

$\frac{(5 x^{2} - 2) \frac{d}{d x} [4 x^{5} + x^{2} + 4] - (4 x^{5} + x^{2} + 4) \frac{d}{d x} [5 x^{2} - 2]}{{(5 x^{2} - 2)}^{2}}$

Step 2

Differentiate.

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Step 2.1

By the Sum Rule, the derivative of $4 x^{5} + x^{2} + 4$ with respect to $x$ is $\frac{d}{d x} [4 x^{5}] + \frac{d}{d x} [x^{2}] + \frac{d}{d x} [4]$ .

$\frac{(5 x^{2} - 2) (\frac{d}{d x} [4 x^{5}] + \frac{d}{d x} [x^{2}] + \frac{d}{d x} [4]) - (4 x^{5} + x^{2} + 4) \frac{d}{d x} [5 x^{2} - 2]}{{(5 x^{2} - 2)}^{2}}$

Step 2.2

Since $4$ is constant with respect to $x$ , the derivative of $4 x^{5}$ with respect to $x$ is $4 \frac{d}{d x} [x^{5}]$ .

$\frac{(5 x^{2} - 2) (4 \frac{d}{d x} [x^{5}] + \frac{d}{d x} [x^{2}] + \frac{d}{d x} [4]) - (4 x^{5} + x^{2} + 4) \frac{d}{d x} [5 x^{2} - 2]}{{(5 x^{2} - 2)}^{2}}$

Step 2.3

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 5$ .

$\frac{(5 x^{2} - 2) (4 (5 x^{4}) + \frac{d}{d x} [x^{2}] + \frac{d}{d x} [4]) - (4 x^{5} + x^{2} + 4) \frac{d}{d x} [5 x^{2} - 2]}{{(5 x^{2} - 2)}^{2}}$

Step 2.4

Multiply $5$ by $4$ .

$\frac{(5 x^{2} - 2) (20 x^{4} + \frac{d}{d x} [x^{2}] + \frac{d}{d x} [4]) - (4 x^{5} + x^{2} + 4) \frac{d}{d x} [5 x^{2} - 2]}{{(5 x^{2} - 2)}^{2}}$

Step 2.5

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 2$ .

$\frac{(5 x^{2} - 2) (20 x^{4} + 2 x + \frac{d}{d x} [4]) - (4 x^{5} + x^{2} + 4) \frac{d}{d x} [5 x^{2} - 2]}{{(5 x^{2} - 2)}^{2}}$

Step 2.6

Since $4$ is constant with respect to $x$ , the derivative of $4$ with respect to $x$ is $0$ .

$\frac{(5 x^{2} - 2) (20 x^{4} + 2 x + 0) - (4 x^{5} + x^{2} + 4) \frac{d}{d x} [5 x^{2} - 2]}{{(5 x^{2} - 2)}^{2}}$

Step 2.7

Add $20 x^{4} + 2 x$ and $0$ .

$\frac{(5 x^{2} - 2) (20 x^{4} + 2 x) - (4 x^{5} + x^{2} + 4) \frac{d}{d x} [5 x^{2} - 2]}{{(5 x^{2} - 2)}^{2}}$

Step 2.8

By the Sum Rule, the derivative of $5 x^{2} - 2$ with respect to $x$ is $\frac{d}{d x} [5 x^{2}] + \frac{d}{d x} [- 2]$ .

$\frac{(5 x^{2} - 2) (20 x^{4} + 2 x) - (4 x^{5} + x^{2} + 4) (\frac{d}{d x} [5 x^{2}] + \frac{d}{d x} [- 2])}{{(5 x^{2} - 2)}^{2}}$

Step 2.9

Since $5$ is constant with respect to $x$ , the derivative of $5 x^{2}$ with respect to $x$ is $5 \frac{d}{d x} [x^{2}]$ .

$\frac{(5 x^{2} - 2) (20 x^{4} + 2 x) - (4 x^{5} + x^{2} + 4) (5 \frac{d}{d x} [x^{2}] + \frac{d}{d x} [- 2])}{{(5 x^{2} - 2)}^{2}}$

Step 2.10

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 2$ .

$\frac{(5 x^{2} - 2) (20 x^{4} + 2 x) - (4 x^{5} + x^{2} + 4) (5 (2 x) + \frac{d}{d x} [- 2])}{{(5 x^{2} - 2)}^{2}}$

Step 2.11

Multiply $2$ by $5$ .

$\frac{(5 x^{2} - 2) (20 x^{4} + 2 x) - (4 x^{5} + x^{2} + 4) (10 x + \frac{d}{d x} [- 2])}{{(5 x^{2} - 2)}^{2}}$

Step 2.12

Since $- 2$ is constant with respect to $x$ , the derivative of $- 2$ with respect to $x$ is $0$ .

$\frac{(5 x^{2} - 2) (20 x^{4} + 2 x) - (4 x^{5} + x^{2} + 4) (10 x + 0)}{{(5 x^{2} - 2)}^{2}}$

Step 2.13

Simplify the expression.

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Step 2.13.1

Add $10 x$ and $0$ .

$\frac{(5 x^{2} - 2) (20 x^{4} + 2 x) - (4 x^{5} + x^{2} + 4) (10 x)}{{(5 x^{2} - 2)}^{2}}$

Step 2.13.2

Multiply $10$ by $- 1$ .

$\frac{(5 x^{2} - 2) (20 x^{4} + 2 x) - 10 (4 x^{5} + x^{2} + 4) x}{{(5 x^{2} - 2)}^{2}}$

Step 3

Simplify.

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Step 3.1

Apply the distributive property.

$\frac{(5 x^{2} - 2) (20 x^{4} + 2 x) + (- 10 (4 x^{5}) - 10 x^{2} - 10 \cdot 4) x}{{(5 x^{2} - 2)}^{2}}$

Step 3.2

Apply the distributive property.

$\frac{(5 x^{2} - 2) (20 x^{4} + 2 x) - 10 (4 x^{5}) x - 10 x^{2} x - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3

Simplify the numerator.

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Step 3.3.1

Simplify each term.

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Step 3.3.1.1

Expand $(5 x^{2} - 2) (20 x^{4} + 2 x)$ using the FOIL Method.

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Step 3.3.1.1.1

Apply the distributive property.

$\frac{5 x^{2} (20 x^{4} + 2 x) - 2 (20 x^{4} + 2 x) - 10 (4 x^{5}) x - 10 x^{2} x - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.1.2

Apply the distributive property.

$\frac{5 x^{2} (20 x^{4}) + 5 x^{2} (2 x) - 2 (20 x^{4} + 2 x) - 10 (4 x^{5}) x - 10 x^{2} x - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.1.3

Apply the distributive property.

$\frac{5 x^{2} (20 x^{4}) + 5 x^{2} (2 x) - 2 (20 x^{4}) - 2 (2 x) - 10 (4 x^{5}) x - 10 x^{2} x - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.2

Simplify each term.

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Step 3.3.1.2.1

Rewrite using the commutative property of multiplication.

$\frac{5 \cdot 20 x^{2} x^{4} + 5 x^{2} (2 x) - 2 (20 x^{4}) - 2 (2 x) - 10 (4 x^{5}) x - 10 x^{2} x - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.2.2

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

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Step 3.3.1.2.2.1

Move $x^{4}$ .

$\frac{5 \cdot 20 (x^{4} x^{2}) + 5 x^{2} (2 x) - 2 (20 x^{4}) - 2 (2 x) - 10 (4 x^{5}) x - 10 x^{2} x - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.2.2.2

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

$\frac{5 \cdot 20 x^{4 + 2} + 5 x^{2} (2 x) - 2 (20 x^{4}) - 2 (2 x) - 10 (4 x^{5}) x - 10 x^{2} x - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.2.2.3

Add $4$ and $2$ .

$\frac{5 \cdot 20 x^{6} + 5 x^{2} (2 x) - 2 (20 x^{4}) - 2 (2 x) - 10 (4 x^{5}) x - 10 x^{2} x - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.2.3

Multiply $5$ by $20$ .

$\frac{100 x^{6} + 5 x^{2} (2 x) - 2 (20 x^{4}) - 2 (2 x) - 10 (4 x^{5}) x - 10 x^{2} x - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.2.4

Rewrite using the commutative property of multiplication.

$\frac{100 x^{6} + 5 \cdot 2 x^{2} x - 2 (20 x^{4}) - 2 (2 x) - 10 (4 x^{5}) x - 10 x^{2} x - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.2.5

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

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Step 3.3.1.2.5.1

Move $x$ .

$\frac{100 x^{6} + 5 \cdot 2 (x \cdot x^{2}) - 2 (20 x^{4}) - 2 (2 x) - 10 (4 x^{5}) x - 10 x^{2} x - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.2.5.2

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

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Step 3.3.1.2.5.2.1

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

$\frac{100 x^{6} + 5 \cdot 2 (x^{1} x^{2}) - 2 (20 x^{4}) - 2 (2 x) - 10 (4 x^{5}) x - 10 x^{2} x - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.2.5.2.2

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

$\frac{100 x^{6} + 5 \cdot 2 x^{1 + 2} - 2 (20 x^{4}) - 2 (2 x) - 10 (4 x^{5}) x - 10 x^{2} x - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.2.5.3

Add $1$ and $2$ .

$\frac{100 x^{6} + 5 \cdot 2 x^{3} - 2 (20 x^{4}) - 2 (2 x) - 10 (4 x^{5}) x - 10 x^{2} x - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.2.6

Multiply $5$ by $2$ .

$\frac{100 x^{6} + 10 x^{3} - 2 (20 x^{4}) - 2 (2 x) - 10 (4 x^{5}) x - 10 x^{2} x - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.2.7

Multiply $20$ by $- 2$ .

$\frac{100 x^{6} + 10 x^{3} - 40 x^{4} - 2 (2 x) - 10 (4 x^{5}) x - 10 x^{2} x - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.2.8

Multiply $2$ by $- 2$ .

$\frac{100 x^{6} + 10 x^{3} - 40 x^{4} - 4 x - 10 (4 x^{5}) x - 10 x^{2} x - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.3

Multiply $x^{5}$ by $x$ by adding the exponents.

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Step 3.3.1.3.1

Move $x$ .

$\frac{100 x^{6} + 10 x^{3} - 40 x^{4} - 4 x - 10 (4 (x \cdot x^{5})) - 10 x^{2} x - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.3.2

Multiply $x$ by $x^{5}$ .

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Step 3.3.1.3.2.1

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

$\frac{100 x^{6} + 10 x^{3} - 40 x^{4} - 4 x - 10 (4 (x^{1} x^{5})) - 10 x^{2} x - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.3.2.2

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

$\frac{100 x^{6} + 10 x^{3} - 40 x^{4} - 4 x - 10 (4 x^{1 + 5}) - 10 x^{2} x - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.3.3

Add $1$ and $5$ .

$\frac{100 x^{6} + 10 x^{3} - 40 x^{4} - 4 x - 10 (4 x^{6}) - 10 x^{2} x - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.4

Multiply $4$ by $- 10$ .

$\frac{100 x^{6} + 10 x^{3} - 40 x^{4} - 4 x - 40 x^{6} - 10 x^{2} x - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.5

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

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Step 3.3.1.5.1

Move $x$ .

$\frac{100 x^{6} + 10 x^{3} - 40 x^{4} - 4 x - 40 x^{6} - 10 (x \cdot x^{2}) - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.5.2

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

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Step 3.3.1.5.2.1

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

$\frac{100 x^{6} + 10 x^{3} - 40 x^{4} - 4 x - 40 x^{6} - 10 (x^{1} x^{2}) - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.5.2.2

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

$\frac{100 x^{6} + 10 x^{3} - 40 x^{4} - 4 x - 40 x^{6} - 10 x^{1 + 2} - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.5.3

Add $1$ and $2$ .

$\frac{100 x^{6} + 10 x^{3} - 40 x^{4} - 4 x - 40 x^{6} - 10 x^{3} - 10 \cdot 4 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.1.6

Multiply $- 10$ by $4$ .

$\frac{100 x^{6} + 10 x^{3} - 40 x^{4} - 4 x - 40 x^{6} - 10 x^{3} - 40 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.2

Combine the opposite terms in $100 x^{6} + 10 x^{3} - 40 x^{4} - 4 x - 40 x^{6} - 10 x^{3} - 40 x$ .

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Step 3.3.2.1

Subtract $10 x^{3}$ from $10 x^{3}$ .

$\frac{100 x^{6} - 40 x^{4} - 4 x - 40 x^{6} + 0 - 40 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.2.2

Add $100 x^{6} - 40 x^{4} - 4 x - 40 x^{6}$ and $0$ .

$\frac{100 x^{6} - 40 x^{4} - 4 x - 40 x^{6} - 40 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.3

Subtract $40 x^{6}$ from $100 x^{6}$ .

$\frac{60 x^{6} - 40 x^{4} - 4 x - 40 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.3.4

Subtract $40 x$ from $- 4 x$ .

$\frac{60 x^{6} - 40 x^{4} - 44 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.4

Factor $4 x$ out of $60 x^{6} - 40 x^{4} - 44 x$ .

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Step 3.4.1

Factor $4 x$ out of $60 x^{6}$ .

$\frac{4 x (15 x^{5}) - 40 x^{4} - 44 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.4.2

Factor $4 x$ out of $- 40 x^{4}$ .

$\frac{4 x (15 x^{5}) + 4 x (- 10 x^{3}) - 44 x}{{(5 x^{2} - 2)}^{2}}$

Step 3.4.3

Factor $4 x$ out of $- 44 x$ .

$\frac{4 x (15 x^{5}) + 4 x (- 10 x^{3}) + 4 x (- 11)}{{(5 x^{2} - 2)}^{2}}$

Step 3.4.4

Factor $4 x$ out of $4 x (15 x^{5}) + 4 x (- 10 x^{3})$ .

$\frac{4 x (15 x^{5} - 10 x^{3}) + 4 x (- 11)}{{(5 x^{2} - 2)}^{2}}$

Step 3.4.5

Factor $4 x$ out of $4 x (15 x^{5} - 10 x^{3}) + 4 x (- 11)$ .

$\frac{4 x (15 x^{5} - 10 x^{3} - 11)}{{(5 x^{2} - 2)}^{2}}$