Calculus Examples

$\frac{x^{2} + 10 x + 25}{{(x + 5)}^{2}}$

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 $f (x) = x^{2} + 10 x + 25$ and $g (x) = {(x + 5)}^{2}$ .

$\frac{{(x + 5)}^{2} \frac{d}{d x} [x^{2} + 10 x + 25] - (x^{2} + 10 x + 25) \frac{d}{d x} [{(x + 5)}^{2}]}{{({(x + 5)}^{2})}^{2}}$

Step 2

Differentiate.

Tap for more steps...

Step 2.1

Multiply the exponents in ${({(x + 5)}^{2})}^{2}$ .

Tap for more steps...

Step 2.1.1

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

$\frac{{(x + 5)}^{2} \frac{d}{d x} [x^{2} + 10 x + 25] - (x^{2} + 10 x + 25) \frac{d}{d x} [{(x + 5)}^{2}]}{{(x + 5)}^{2 \cdot 2}}$

Step 2.1.2

Multiply $2$ by $2$ .

$\frac{{(x + 5)}^{2} \frac{d}{d x} [x^{2} + 10 x + 25] - (x^{2} + 10 x + 25) \frac{d}{d x} [{(x + 5)}^{2}]}{{(x + 5)}^{4}}$

Step 2.2

By the Sum Rule, the derivative of $x^{2} + 10 x + 25$ with respect to $x$ is $\frac{d}{d x} [x^{2}] + \frac{d}{d x} [10 x] + \frac{d}{d x} [25]$ .

$\frac{{(x + 5)}^{2} (\frac{d}{d x} [x^{2}] + \frac{d}{d x} [10 x] + \frac{d}{d x} [25]) - (x^{2} + 10 x + 25) \frac{d}{d x} [{(x + 5)}^{2}]}{{(x + 5)}^{4}}$

Step 2.3

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

$\frac{{(x + 5)}^{2} (2 x + \frac{d}{d x} [10 x] + \frac{d}{d x} [25]) - (x^{2} + 10 x + 25) \frac{d}{d x} [{(x + 5)}^{2}]}{{(x + 5)}^{4}}$

Step 2.4

Since $10$ is constant with respect to $x$ , the derivative of $10 x$ with respect to $x$ is $10 \frac{d}{d x} [x]$ .

$\frac{{(x + 5)}^{2} (2 x + 10 \frac{d}{d x} [x] + \frac{d}{d x} [25]) - (x^{2} + 10 x + 25) \frac{d}{d x} [{(x + 5)}^{2}]}{{(x + 5)}^{4}}$

Step 2.5

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

$\frac{{(x + 5)}^{2} (2 x + 10 \cdot 1 + \frac{d}{d x} [25]) - (x^{2} + 10 x + 25) \frac{d}{d x} [{(x + 5)}^{2}]}{{(x + 5)}^{4}}$

Step 2.6

Multiply $10$ by $1$ .

$\frac{{(x + 5)}^{2} (2 x + 10 + \frac{d}{d x} [25]) - (x^{2} + 10 x + 25) \frac{d}{d x} [{(x + 5)}^{2}]}{{(x + 5)}^{4}}$

Step 2.7

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

$\frac{{(x + 5)}^{2} (2 x + 10 + 0) - (x^{2} + 10 x + 25) \frac{d}{d x} [{(x + 5)}^{2}]}{{(x + 5)}^{4}}$

Step 2.8

Add $2 x + 10$ and $0$ .

$\frac{{(x + 5)}^{2} (2 x + 10) - (x^{2} + 10 x + 25) \frac{d}{d x} [{(x + 5)}^{2}]}{{(x + 5)}^{4}}$

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 $g (x) = x + 5$ .

Tap for more steps...

Step 3.1

To apply the Chain Rule, set $u$ as $x + 5$ .

$\frac{{(x + 5)}^{2} (2 x + 10) - (x^{2} + 10 x + 25) (\frac{d}{d u} [u^{2}] \frac{d}{d x} [x + 5])}{{(x + 5)}^{4}}$

Step 3.2

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

$\frac{{(x + 5)}^{2} (2 x + 10) - (x^{2} + 10 x + 25) (2 u \frac{d}{d x} [x + 5])}{{(x + 5)}^{4}}$

Step 3.3

Replace all occurrences of $u$ with $x + 5$ .

$\frac{{(x + 5)}^{2} (2 x + 10) - (x^{2} + 10 x + 25) (2 (x + 5) \frac{d}{d x} [x + 5])}{{(x + 5)}^{4}}$

Step 4

Simplify with factoring out.

Tap for more steps...

Step 4.1

Multiply $2$ by $- 1$ .

$\frac{{(x + 5)}^{2} (2 x + 10) - 2 (x^{2} + 10 x + 25) ((x + 5) \frac{d}{d x} [x + 5])}{{(x + 5)}^{4}}$

Step 4.2

Factor $x + 5$ out of ${(x + 5)}^{2} (2 x + 10) - 2 (x^{2} + 10 x + 25) ((x + 5) \frac{d}{d x} [x + 5])$ .

Tap for more steps...

Step 4.2.1

Factor $x + 5$ out of ${(x + 5)}^{2} (2 x + 10)$ .

$\frac{(x + 5) ((x + 5) (2 x + 10)) - 2 (x^{2} + 10 x + 25) ((x + 5) \frac{d}{d x} [x + 5])}{{(x + 5)}^{4}}$

Step 4.2.2

Factor $x + 5$ out of $- 2 (x^{2} + 10 x + 25) ((x + 5) \frac{d}{d x} [x + 5])$ .

$\frac{(x + 5) ((x + 5) (2 x + 10)) + (x + 5) (- 2 (x^{2} + 10 x + 25) (\frac{d}{d x} [x + 5]))}{{(x + 5)}^{4}}$

Step 4.2.3

Factor $x + 5$ out of $(x + 5) ((x + 5) (2 x + 10)) + (x + 5) (- 2 (x^{2} + 10 x + 25) (\frac{d}{d x} [x + 5]))$ .

$\frac{(x + 5) ((x + 5) (2 x + 10) - 2 (x^{2} + 10 x + 25) (\frac{d}{d x} [x + 5]))}{{(x + 5)}^{4}}$

Step 5

Cancel the common factors.

Tap for more steps...

Step 5.1

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

$\frac{(x + 5) ((x + 5) (2 x + 10) - 2 (x^{2} + 10 x + 25) (\frac{d}{d x} [x + 5]))}{(x + 5) {(x + 5)}^{3}}$

Step 5.2

Cancel the common factor.

$\frac{(x + 5) ((x + 5) (2 x + 10) - 2 (x^{2} + 10 x + 25) (\frac{d}{d x} [x + 5]))}{(x + 5) {(x + 5)}^{3}}$

Step 5.3

Rewrite the expression.

$\frac{(x + 5) (2 x + 10) - 2 (x^{2} + 10 x + 25) (\frac{d}{d x} [x + 5])}{{(x + 5)}^{3}}$

Step 6

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

$\frac{(x + 5) (2 x + 10) - 2 (x^{2} + 10 x + 25) (\frac{d}{d x} [x] + \frac{d}{d x} [5])}{{(x + 5)}^{3}}$

Step 7

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

$\frac{(x + 5) (2 x + 10) - 2 (x^{2} + 10 x + 25) (1 + \frac{d}{d x} [5])}{{(x + 5)}^{3}}$

Step 8

Since $5$ is constant with respect to $x$ , the derivative of $5$ with respect to $x$ is $0$ .

$\frac{(x + 5) (2 x + 10) - 2 (x^{2} + 10 x + 25) (1 + 0)}{{(x + 5)}^{3}}$

Step 9

Simplify the expression.

Tap for more steps...

Step 9.1

Add $1$ and $0$ .

$\frac{(x + 5) (2 x + 10) - 2 (x^{2} + 10 x + 25) \cdot 1}{{(x + 5)}^{3}}$

Step 9.2

Multiply $- 2$ by $1$ .

$\frac{(x + 5) (2 x + 10) - 2 (x^{2} + 10 x + 25)}{{(x + 5)}^{3}}$

Step 10

Simplify.

Tap for more steps...

Step 10.1

Apply the distributive property.

$\frac{(x + 5) (2 x + 10) - 2 x^{2} - 2 (10 x) - 2 \cdot 25}{{(x + 5)}^{3}}$

Step 10.2

Simplify the numerator.

Tap for more steps...

Step 10.2.1

Simplify each term.

Tap for more steps...

Step 10.2.1.1

Expand $(x + 5) (2 x + 10)$ using the FOIL Method.

Tap for more steps...

Step 10.2.1.1.1

Apply the distributive property.

$\frac{x (2 x + 10) + 5 (2 x + 10) - 2 x^{2} - 2 (10 x) - 2 \cdot 25}{{(x + 5)}^{3}}$

Step 10.2.1.1.2

Apply the distributive property.

$\frac{x (2 x) + x \cdot 10 + 5 (2 x + 10) - 2 x^{2} - 2 (10 x) - 2 \cdot 25}{{(x + 5)}^{3}}$

Step 10.2.1.1.3

Apply the distributive property.

$\frac{x (2 x) + x \cdot 10 + 5 (2 x) + 5 \cdot 10 - 2 x^{2} - 2 (10 x) - 2 \cdot 25}{{(x + 5)}^{3}}$

Step 10.2.1.2

Simplify and combine like terms.

Tap for more steps...

Step 10.2.1.2.1

Simplify each term.

Tap for more steps...

Step 10.2.1.2.1.1

Rewrite using the commutative property of multiplication.

$\frac{2 x \cdot x + x \cdot 10 + 5 (2 x) + 5 \cdot 10 - 2 x^{2} - 2 (10 x) - 2 \cdot 25}{{(x + 5)}^{3}}$

Step 10.2.1.2.1.2

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

Tap for more steps...

Step 10.2.1.2.1.2.1

Move $x$ .

$\frac{2 (x \cdot x) + x \cdot 10 + 5 (2 x) + 5 \cdot 10 - 2 x^{2} - 2 (10 x) - 2 \cdot 25}{{(x + 5)}^{3}}$

Step 10.2.1.2.1.2.2

Multiply $x$ by $x$ .

$\frac{2 x^{2} + x \cdot 10 + 5 (2 x) + 5 \cdot 10 - 2 x^{2} - 2 (10 x) - 2 \cdot 25}{{(x + 5)}^{3}}$

Step 10.2.1.2.1.3

Move $10$ to the left of $x$ .

$\frac{2 x^{2} + 10 \cdot x + 5 (2 x) + 5 \cdot 10 - 2 x^{2} - 2 (10 x) - 2 \cdot 25}{{(x + 5)}^{3}}$

Step 10.2.1.2.1.4

Multiply $2$ by $5$ .

$\frac{2 x^{2} + 10 x + 10 x + 5 \cdot 10 - 2 x^{2} - 2 (10 x) - 2 \cdot 25}{{(x + 5)}^{3}}$

Step 10.2.1.2.1.5

Multiply $5$ by $10$ .

$\frac{2 x^{2} + 10 x + 10 x + 50 - 2 x^{2} - 2 (10 x) - 2 \cdot 25}{{(x + 5)}^{3}}$

Step 10.2.1.2.2

Add $10 x$ and $10 x$ .

$\frac{2 x^{2} + 20 x + 50 - 2 x^{2} - 2 (10 x) - 2 \cdot 25}{{(x + 5)}^{3}}$

Step 10.2.1.3

Multiply $10$ by $- 2$ .

$\frac{2 x^{2} + 20 x + 50 - 2 x^{2} - 20 x - 2 \cdot 25}{{(x + 5)}^{3}}$

Step 10.2.1.4

Multiply $- 2$ by $25$ .

$\frac{2 x^{2} + 20 x + 50 - 2 x^{2} - 20 x - 50}{{(x + 5)}^{3}}$

Step 10.2.2

Combine the opposite terms in $2 x^{2} + 20 x + 50 - 2 x^{2} - 20 x - 50$ .

Tap for more steps...

Step 10.2.2.1

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

$\frac{20 x + 50 + 0 - 20 x - 50}{{(x + 5)}^{3}}$

Step 10.2.2.2

Add $20 x + 50$ and $0$ .

$\frac{20 x + 50 - 20 x - 50}{{(x + 5)}^{3}}$

Step 10.2.2.3

Subtract $20 x$ from $20 x$ .

$\frac{0 + 50 - 50}{{(x + 5)}^{3}}$

Step 10.2.2.4

Add $0$ and $50$ .

$\frac{50 - 50}{{(x + 5)}^{3}}$

Step 10.2.2.5

Subtract $50$ from $50$ .

$\frac{0}{{(x + 5)}^{3}}$

Step 10.3

Divide $0$ by ${(x + 5)}^{3}$ .

$0$