Calculus Examples

$\frac{- x^{2} - 25}{{(x^{2} - 25)}^{2}}$

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 $f (x) = - x^{2} - 25$ and $g (x) = {(x^{2} - 25)}^{2}$ .

$\frac{{(x^{2} - 25)}^{2} \frac{d}{d x} [- x^{2} - 25] - (- x^{2} - 25) \frac{d}{d x} [{(x^{2} - 25)}^{2}]}{{({(x^{2} - 25)}^{2})}^{2}}$

Step 2

Differentiate.

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Step 2.1

Multiply the exponents in ${({(x^{2} - 25)}^{2})}^{2}$ .

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Step 2.1.1

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

$\frac{{(x^{2} - 25)}^{2} \frac{d}{d x} [- x^{2} - 25] - (- x^{2} - 25) \frac{d}{d x} [{(x^{2} - 25)}^{2}]}{{(x^{2} - 25)}^{2 \cdot 2}}$

Step 2.1.2

Multiply $2$ by $2$ .

$\frac{{(x^{2} - 25)}^{2} \frac{d}{d x} [- x^{2} - 25] - (- x^{2} - 25) \frac{d}{d x} [{(x^{2} - 25)}^{2}]}{{(x^{2} - 25)}^{4}}$

Step 2.2

By the Sum Rule, the derivative of $- x^{2} - 25$ with respect to $x$ is $\frac{d}{d x} [- x^{2}] + \frac{d}{d x} [- 25]$ .

$\frac{{(x^{2} - 25)}^{2} (\frac{d}{d x} [- x^{2}] + \frac{d}{d x} [- 25]) - (- x^{2} - 25) \frac{d}{d x} [{(x^{2} - 25)}^{2}]}{{(x^{2} - 25)}^{4}}$

Step 2.3

Since $- 1$ is constant with respect to $x$ , the derivative of $- x^{2}$ with respect to $x$ is $- \frac{d}{d x} [x^{2}]$ .

$\frac{{(x^{2} - 25)}^{2} (- \frac{d}{d x} [x^{2}] + \frac{d}{d x} [- 25]) - (- x^{2} - 25) \frac{d}{d x} [{(x^{2} - 25)}^{2}]}{{(x^{2} - 25)}^{4}}$

Step 2.4

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

$\frac{{(x^{2} - 25)}^{2} (- (2 x) + \frac{d}{d x} [- 25]) - (- x^{2} - 25) \frac{d}{d x} [{(x^{2} - 25)}^{2}]}{{(x^{2} - 25)}^{4}}$

Step 2.5

Multiply $2$ by $- 1$ .

$\frac{{(x^{2} - 25)}^{2} (- 2 x + \frac{d}{d x} [- 25]) - (- x^{2} - 25) \frac{d}{d x} [{(x^{2} - 25)}^{2}]}{{(x^{2} - 25)}^{4}}$

Step 2.6

Since $- 25$ is constant with respect to $x$ , the derivative of $- 25$ with respect to $x$ is $0$ .

$\frac{{(x^{2} - 25)}^{2} (- 2 x + 0) - (- x^{2} - 25) \frac{d}{d x} [{(x^{2} - 25)}^{2}]}{{(x^{2} - 25)}^{4}}$

Step 2.7

Add $- 2 x$ and $0$ .

$\frac{{(x^{2} - 25)}^{2} (- 2 x) - (- x^{2} - 25) \frac{d}{d x} [{(x^{2} - 25)}^{2}]}{{(x^{2} - 25)}^{4}}$

Step 3

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = x^{2}$ and $g (x) = x^{2} - 25$ .

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Step 3.1

To apply the Chain Rule, set $u$ as $x^{2} - 25$ .

$\frac{{(x^{2} - 25)}^{2} (- 2 x) - (- x^{2} - 25) (\frac{d}{d u} [u^{2}] \frac{d}{d x} [x^{2} - 25])}{{(x^{2} - 25)}^{4}}$

Step 3.2

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

$\frac{{(x^{2} - 25)}^{2} (- 2 x) - (- x^{2} - 25) (2 u \frac{d}{d x} [x^{2} - 25])}{{(x^{2} - 25)}^{4}}$

Step 3.3

Replace all occurrences of $u$ with $x^{2} - 25$ .

$\frac{{(x^{2} - 25)}^{2} (- 2 x) - (- x^{2} - 25) (2 (x^{2} - 25) \frac{d}{d x} [x^{2} - 25])}{{(x^{2} - 25)}^{4}}$

Step 4

Differentiate.

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Step 4.1

Multiply $2$ by $- 1$ .

$\frac{{(x^{2} - 25)}^{2} (- 2 x) - 2 (- x^{2} - 25) ((x^{2} - 25) \frac{d}{d x} [x^{2} - 25])}{{(x^{2} - 25)}^{4}}$

Step 4.2

By the Sum Rule, the derivative of $x^{2} - 25$ with respect to $x$ is $\frac{d}{d x} [x^{2}] + \frac{d}{d x} [- 25]$ .

$\frac{{(x^{2} - 25)}^{2} (- 2 x) - 2 (- x^{2} - 25) ((x^{2} - 25) (\frac{d}{d x} [x^{2}] + \frac{d}{d x} [- 25]))}{{(x^{2} - 25)}^{4}}$

Step 4.3

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

$\frac{{(x^{2} - 25)}^{2} (- 2 x) - 2 (- x^{2} - 25) ((x^{2} - 25) (2 x + \frac{d}{d x} [- 25]))}{{(x^{2} - 25)}^{4}}$

Step 4.4

Since $- 25$ is constant with respect to $x$ , the derivative of $- 25$ with respect to $x$ is $0$ .

$\frac{{(x^{2} - 25)}^{2} (- 2 x) - 2 (- x^{2} - 25) ((x^{2} - 25) (2 x + 0))}{{(x^{2} - 25)}^{4}}$

Step 4.5

Simplify the expression.

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Step 4.5.1

Add $2 x$ and $0$ .

$\frac{{(x^{2} - 25)}^{2} (- 2 x) - 2 (- x^{2} - 25) ((x^{2} - 25) (2 x))}{{(x^{2} - 25)}^{4}}$

Step 4.5.2

Move $2$ to the left of $x^{2} - 25$ .

$\frac{{(x^{2} - 25)}^{2} (- 2 x) - 2 (- x^{2} - 25) (2 \cdot (x^{2} - 25) x)}{{(x^{2} - 25)}^{4}}$

Step 4.5.3

Multiply $2$ by $- 2$ .

$\frac{{(x^{2} - 25)}^{2} (- 2 x) - 4 (- x^{2} - 25) ((x^{2} - 25) x)}{{(x^{2} - 25)}^{4}}$

Step 5

Simplify.

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Step 5.1

Apply the distributive property.

$\frac{{(x^{2} - 25)}^{2} (- 2 x) + (- 4 (- x^{2}) - 4 \cdot - 25) ((x^{2} - 25) x)}{{(x^{2} - 25)}^{4}}$

Step 5.2

Apply the distributive property.

$\frac{{(x^{2} - 25)}^{2} (- 2 x) + (- 4 (- x^{2}) - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3

Simplify the numerator.

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Step 5.3.1

Simplify each term.

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Step 5.3.1.1

Rewrite using the commutative property of multiplication.

$\frac{- 2 {(x^{2} - 25)}^{2} x + (- 4 (- x^{2}) - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.2

Rewrite ${(x^{2} - 25)}^{2}$ as $(x^{2} - 25) (x^{2} - 25)$ .

$\frac{- 2 ((x^{2} - 25) (x^{2} - 25)) x + (- 4 (- x^{2}) - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.3

Expand $(x^{2} - 25) (x^{2} - 25)$ using the FOIL Method.

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Step 5.3.1.3.1

Apply the distributive property.

$\frac{- 2 (x^{2} (x^{2} - 25) - 25 (x^{2} - 25)) x + (- 4 (- x^{2}) - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.3.2

Apply the distributive property.

$\frac{- 2 (x^{2} x^{2} + x^{2} \cdot - 25 - 25 (x^{2} - 25)) x + (- 4 (- x^{2}) - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.3.3

Apply the distributive property.

$\frac{- 2 (x^{2} x^{2} + x^{2} \cdot - 25 - 25 x^{2} - 25 \cdot - 25) x + (- 4 (- x^{2}) - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.4

Simplify and combine like terms.

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Step 5.3.1.4.1

Simplify each term.

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Step 5.3.1.4.1.1

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

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Step 5.3.1.4.1.1.1

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

$\frac{- 2 (x^{2 + 2} + x^{2} \cdot - 25 - 25 x^{2} - 25 \cdot - 25) x + (- 4 (- x^{2}) - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.4.1.1.2

Add $2$ and $2$ .

$\frac{- 2 (x^{4} + x^{2} \cdot - 25 - 25 x^{2} - 25 \cdot - 25) x + (- 4 (- x^{2}) - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.4.1.2

Move $- 25$ to the left of $x^{2}$ .

$\frac{- 2 (x^{4} - 25 \cdot x^{2} - 25 x^{2} - 25 \cdot - 25) x + (- 4 (- x^{2}) - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.4.1.3

Multiply $- 25$ by $- 25$ .

$\frac{- 2 (x^{4} - 25 x^{2} - 25 x^{2} + 625) x + (- 4 (- x^{2}) - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.4.2

Subtract $25 x^{2}$ from $- 25 x^{2}$ .

$\frac{- 2 (x^{4} - 50 x^{2} + 625) x + (- 4 (- x^{2}) - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.5

Apply the distributive property.

$\frac{(- 2 x^{4} - 2 (- 50 x^{2}) - 2 \cdot 625) x + (- 4 (- x^{2}) - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.6

Simplify.

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Step 5.3.1.6.1

Multiply $- 50$ by $- 2$ .

$\frac{(- 2 x^{4} + 100 x^{2} - 2 \cdot 625) x + (- 4 (- x^{2}) - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.6.2

Multiply $- 2$ by $625$ .

$\frac{(- 2 x^{4} + 100 x^{2} - 1250) x + (- 4 (- x^{2}) - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.7

Apply the distributive property.

$\frac{- 2 x^{4} x + 100 x^{2} x - 1250 x + (- 4 (- x^{2}) - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.8

Simplify.

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Step 5.3.1.8.1

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

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Step 5.3.1.8.1.1

Move $x$ .

$\frac{- 2 (x \cdot x^{4}) + 100 x^{2} x - 1250 x + (- 4 (- x^{2}) - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.8.1.2

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

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Step 5.3.1.8.1.2.1

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

$\frac{- 2 (x^{1} x^{4}) + 100 x^{2} x - 1250 x + (- 4 (- x^{2}) - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.8.1.2.2

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

$\frac{- 2 x^{1 + 4} + 100 x^{2} x - 1250 x + (- 4 (- x^{2}) - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.8.1.3

Add $1$ and $4$ .

$\frac{- 2 x^{5} + 100 x^{2} x - 1250 x + (- 4 (- x^{2}) - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.8.2

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

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Step 5.3.1.8.2.1

Move $x$ .

$\frac{- 2 x^{5} + 100 (x \cdot x^{2}) - 1250 x + (- 4 (- x^{2}) - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.8.2.2

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

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Step 5.3.1.8.2.2.1

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

$\frac{- 2 x^{5} + 100 (x^{1} x^{2}) - 1250 x + (- 4 (- x^{2}) - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.8.2.2.2

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

$\frac{- 2 x^{5} + 100 x^{1 + 2} - 1250 x + (- 4 (- x^{2}) - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.8.2.3

Add $1$ and $2$ .

$\frac{- 2 x^{5} + 100 x^{3} - 1250 x + (- 4 (- x^{2}) - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.9

Simplify each term.

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Step 5.3.1.9.1

Multiply $- 1$ by $- 4$ .

$\frac{- 2 x^{5} + 100 x^{3} - 1250 x + (4 x^{2} - 4 \cdot - 25) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.9.2

Multiply $- 4$ by $- 25$ .

$\frac{- 2 x^{5} + 100 x^{3} - 1250 x + (4 x^{2} + 100) (x^{2} x - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.10

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

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Step 5.3.1.10.1

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

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Step 5.3.1.10.1.1

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

$\frac{- 2 x^{5} + 100 x^{3} - 1250 x + (4 x^{2} + 100) (x^{2} x^{1} - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.10.1.2

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

$\frac{- 2 x^{5} + 100 x^{3} - 1250 x + (4 x^{2} + 100) (x^{2 + 1} - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.10.2

Add $2$ and $1$ .

$\frac{- 2 x^{5} + 100 x^{3} - 1250 x + (4 x^{2} + 100) (x^{3} - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.11

Expand $(4 x^{2} + 100) (x^{3} - 25 x)$ using the FOIL Method.

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Step 5.3.1.11.1

Apply the distributive property.

$\frac{- 2 x^{5} + 100 x^{3} - 1250 x + 4 x^{2} (x^{3} - 25 x) + 100 (x^{3} - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.11.2

Apply the distributive property.

$\frac{- 2 x^{5} + 100 x^{3} - 1250 x + 4 x^{2} x^{3} + 4 x^{2} (- 25 x) + 100 (x^{3} - 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.11.3

Apply the distributive property.

$\frac{- 2 x^{5} + 100 x^{3} - 1250 x + 4 x^{2} x^{3} + 4 x^{2} (- 25 x) + 100 x^{3} + 100 (- 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.12

Simplify and combine like terms.

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Step 5.3.1.12.1

Simplify each term.

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Step 5.3.1.12.1.1

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

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Step 5.3.1.12.1.1.1

Move $x^{3}$ .

$\frac{- 2 x^{5} + 100 x^{3} - 1250 x + 4 (x^{3} x^{2}) + 4 x^{2} (- 25 x) + 100 x^{3} + 100 (- 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.12.1.1.2

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

$\frac{- 2 x^{5} + 100 x^{3} - 1250 x + 4 x^{3 + 2} + 4 x^{2} (- 25 x) + 100 x^{3} + 100 (- 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.12.1.1.3

Add $3$ and $2$ .

$\frac{- 2 x^{5} + 100 x^{3} - 1250 x + 4 x^{5} + 4 x^{2} (- 25 x) + 100 x^{3} + 100 (- 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.12.1.2

Rewrite using the commutative property of multiplication.

$\frac{- 2 x^{5} + 100 x^{3} - 1250 x + 4 x^{5} + 4 \cdot - 25 x^{2} x + 100 x^{3} + 100 (- 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.12.1.3

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

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Step 5.3.1.12.1.3.1

Move $x$ .

$\frac{- 2 x^{5} + 100 x^{3} - 1250 x + 4 x^{5} + 4 \cdot - 25 (x \cdot x^{2}) + 100 x^{3} + 100 (- 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.12.1.3.2

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

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Step 5.3.1.12.1.3.2.1

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

$\frac{- 2 x^{5} + 100 x^{3} - 1250 x + 4 x^{5} + 4 \cdot - 25 (x^{1} x^{2}) + 100 x^{3} + 100 (- 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.12.1.3.2.2

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

$\frac{- 2 x^{5} + 100 x^{3} - 1250 x + 4 x^{5} + 4 \cdot - 25 x^{1 + 2} + 100 x^{3} + 100 (- 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.12.1.3.3

Add $1$ and $2$ .

$\frac{- 2 x^{5} + 100 x^{3} - 1250 x + 4 x^{5} + 4 \cdot - 25 x^{3} + 100 x^{3} + 100 (- 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.12.1.4

Multiply $4$ by $- 25$ .

$\frac{- 2 x^{5} + 100 x^{3} - 1250 x + 4 x^{5} - 100 x^{3} + 100 x^{3} + 100 (- 25 x)}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.12.1.5

Multiply $- 25$ by $100$ .

$\frac{- 2 x^{5} + 100 x^{3} - 1250 x + 4 x^{5} - 100 x^{3} + 100 x^{3} - 2500 x}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.12.2

Add $- 100 x^{3}$ and $100 x^{3}$ .

$\frac{- 2 x^{5} + 100 x^{3} - 1250 x + 4 x^{5} + 0 - 2500 x}{{(x^{2} - 25)}^{4}}$

Step 5.3.1.12.3

Add $4 x^{5}$ and $0$ .

$\frac{- 2 x^{5} + 100 x^{3} - 1250 x + 4 x^{5} - 2500 x}{{(x^{2} - 25)}^{4}}$

Step 5.3.2

Add $- 2 x^{5}$ and $4 x^{5}$ .

$\frac{2 x^{5} + 100 x^{3} - 1250 x - 2500 x}{{(x^{2} - 25)}^{4}}$

Step 5.3.3

Subtract $2500 x$ from $- 1250 x$ .

$\frac{2 x^{5} + 100 x^{3} - 3750 x}{{(x^{2} - 25)}^{4}}$

Step 5.4

Simplify the numerator.

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Step 5.4.1

Factor $2 x$ out of $2 x^{5} + 100 x^{3} - 3750 x$ .

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Step 5.4.1.1

Factor $2 x$ out of $2 x^{5}$ .

$\frac{2 x (x^{4}) + 100 x^{3} - 3750 x}{{(x^{2} - 25)}^{4}}$

Step 5.4.1.2

Factor $2 x$ out of $100 x^{3}$ .

$\frac{2 x (x^{4}) + 2 x (50 x^{2}) - 3750 x}{{(x^{2} - 25)}^{4}}$

Step 5.4.1.3

Factor $2 x$ out of $- 3750 x$ .

$\frac{2 x (x^{4}) + 2 x (50 x^{2}) + 2 x (- 1875)}{{(x^{2} - 25)}^{4}}$

Step 5.4.1.4

Factor $2 x$ out of $2 x (x^{4}) + 2 x (50 x^{2})$ .

$\frac{2 x (x^{4} + 50 x^{2}) + 2 x (- 1875)}{{(x^{2} - 25)}^{4}}$

Step 5.4.1.5

Factor $2 x$ out of $2 x (x^{4} + 50 x^{2}) + 2 x (- 1875)$ .

$\frac{2 x (x^{4} + 50 x^{2} - 1875)}{{(x^{2} - 25)}^{4}}$

Step 5.4.2

Rewrite $x^{4}$ as ${(x^{2})}^{2}$ .

$\frac{2 x ({(x^{2})}^{2} + 50 x^{2} - 1875)}{{(x^{2} - 25)}^{4}}$

Step 5.4.3

Let $u = x^{2}$ . Substitute $u$ for all occurrences of $x^{2}$ .

$\frac{2 x (u^{2} + 50 u - 1875)}{{(x^{2} - 25)}^{4}}$

Step 5.4.4

Factor $u^{2} + 50 u - 1875$ using the AC method.

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Step 5.4.4.1

Consider the form $x^{2} + b x + c$ . Find a pair of integers whose product is $c$ and whose sum is $b$ . In this case, whose product is $- 1875$ and whose sum is $50$ .

$- 25, 75$

Step 5.4.4.2

Write the factored form using these integers.

$\frac{2 x ((u - 25) (u + 75))}{{(x^{2} - 25)}^{4}}$

Step 5.4.5

Replace all occurrences of $u$ with $x^{2}$ .

$\frac{2 x ((x^{2} - 25) (x^{2} + 75))}{{(x^{2} - 25)}^{4}}$

Step 5.4.6

Rewrite $25$ as $5^{2}$ .

$\frac{2 x ((x^{2} - 5^{2}) (x^{2} + 75))}{{(x^{2} - 25)}^{4}}$

Step 5.4.7

Since both terms are perfect squares, factor using the difference of squares formula, $a^{2} - b^{2} = (a + b) (a - b)$ where $a = x$ and $b = 5$ .

$\frac{2 x (x + 5) (x - 5) (x^{2} + 75)}{{(x^{2} - 25)}^{4}}$

Step 5.5

Simplify the denominator.

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Step 5.5.1

Rewrite $25$ as $5^{2}$ .

$\frac{2 x (x + 5) (x - 5) (x^{2} + 75)}{{(x^{2} - 5^{2})}^{4}}$

Step 5.5.2

Since both terms are perfect squares, factor using the difference of squares formula, $a^{2} - b^{2} = (a + b) (a - b)$ where $a = x$ and $b = 5$ .

$\frac{2 x (x + 5) (x - 5) (x^{2} + 75)}{{((x + 5) (x - 5))}^{4}}$

Step 5.5.3

Apply the product rule to $(x + 5) (x - 5)$ .

$\frac{2 x (x + 5) (x - 5) (x^{2} + 75)}{{(x + 5)}^{4} {(x - 5)}^{4}}$

Step 5.6

Cancel the common factor of $x + 5$ and ${(x + 5)}^{4}$ .

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Step 5.6.1

Factor $x + 5$ out of $2 x (x + 5) (x - 5) (x^{2} + 75)$ .

$\frac{(x + 5) ((2 x (x - 5)) (x^{2} + 75))}{{(x + 5)}^{4} {(x - 5)}^{4}}$

Step 5.6.2

Cancel the common factors.

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Step 5.6.2.1

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

$\frac{(x + 5) ((2 x (x - 5)) (x^{2} + 75))}{(x + 5) ({(x + 5)}^{3} {(x - 5)}^{4})}$

Step 5.6.2.2

Cancel the common factor.

$\frac{(x + 5) ((2 x (x - 5)) (x^{2} + 75))}{(x + 5) ({(x + 5)}^{3} {(x - 5)}^{4})}$

Step 5.6.2.3

Rewrite the expression.

$\frac{(2 x (x - 5)) (x^{2} + 75)}{{(x + 5)}^{3} {(x - 5)}^{4}}$

Step 5.7

Cancel the common factor of $x - 5$ and ${(x - 5)}^{4}$ .

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Step 5.7.1

Factor $x - 5$ out of $(2 x (x - 5)) (x^{2} + 75)$ .

$\frac{(x - 5) ((2 x) (x^{2} + 75))}{{(x + 5)}^{3} {(x - 5)}^{4}}$

Step 5.7.2

Cancel the common factors.

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Step 5.7.2.1

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

$\frac{(x - 5) ((2 x) (x^{2} + 75))}{(x - 5) ({(x + 5)}^{3} {(x - 5)}^{3})}$

Step 5.7.2.2

Cancel the common factor.

$\frac{(x - 5) ((2 x) (x^{2} + 75))}{(x - 5) ({(x + 5)}^{3} {(x - 5)}^{3})}$

Step 5.7.2.3

Rewrite the expression.

$\frac{(2 x) (x^{2} + 75)}{{(x + 5)}^{3} {(x - 5)}^{3}}$

$\frac{2 x (x^{2} + 75)}{{(x + 5)}^{3} {(x - 5)}^{3}}$