Calculus Examples

$y = \frac{x^{2} + 3 e^{x}}{2 e^{x} - x}$

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 $f (x) = x^{2} + 3 e^{x}$ and $g (x) = 2 e^{x} - x$ .

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

Step 2

Differentiate.

Tap for more steps...

Step 2.1

By the Sum Rule, the derivative of $x^{2} + 3 e^{x}$ with respect to $x$ is $\frac{d}{d x} [x^{2}] + \frac{d}{d x} [3 e^{x}]$ .

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

Step 2.2

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

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

Step 2.3

Since $3$ is constant with respect to $x$ , the derivative of $3 e^{x}$ with respect to $x$ is $3 \frac{d}{d x} [e^{x}]$ .

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

Step 3

Differentiate using the Exponential Rule which states that $\frac{d}{d x} [a^{x}]$ is $a^{x} \ln (a)$ where $a$ = $e$ .

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

Step 4

Differentiate.

Tap for more steps...

Step 4.1

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

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

Step 4.2

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

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

Step 5

Differentiate using the Exponential Rule which states that $\frac{d}{d x} [a^{x}]$ is $a^{x} \ln (a)$ where $a$ = $e$ .

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

Step 6

Differentiate.

Tap for more steps...

Step 6.1

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

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

Step 6.2

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

$\frac{(2 e^{x} - x) (2 x + 3 e^{x}) - (x^{2} + 3 e^{x}) (2 e^{x} - 1 \cdot 1)}{{(2 e^{x} - x)}^{2}}$

Step 6.3

Multiply $- 1$ by $1$ .

$\frac{(2 e^{x} - x) (2 x + 3 e^{x}) - (x^{2} + 3 e^{x}) (2 e^{x} - 1)}{{(2 e^{x} - x)}^{2}}$

Step 7

Simplify.

Tap for more steps...

Step 7.1

Apply the distributive property.

$\frac{(2 e^{x} - x) (2 x + 3 e^{x}) + (- x^{2} - (3 e^{x})) (2 e^{x} - 1)}{{(2 e^{x} - x)}^{2}}$

Step 7.2

Simplify the numerator.

Tap for more steps...

Step 7.2.1

Simplify each term.

Tap for more steps...

Step 7.2.1.1

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

Tap for more steps...

Step 7.2.1.1.1

Apply the distributive property.

$\frac{2 e^{x} (2 x + 3 e^{x}) - x (2 x + 3 e^{x}) + (- x^{2} - (3 e^{x})) (2 e^{x} - 1)}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.1.2

Apply the distributive property.

$\frac{2 e^{x} (2 x) + 2 e^{x} (3 e^{x}) - x (2 x + 3 e^{x}) + (- x^{2} - (3 e^{x})) (2 e^{x} - 1)}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.1.3

Apply the distributive property.

$\frac{2 e^{x} (2 x) + 2 e^{x} (3 e^{x}) - x (2 x) - x (3 e^{x}) + (- x^{2} - (3 e^{x})) (2 e^{x} - 1)}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.2

Simplify and combine like terms.

Tap for more steps...

Step 7.2.1.2.1

Simplify each term.

Tap for more steps...

Step 7.2.1.2.1.1

Rewrite using the commutative property of multiplication.

$\frac{2 \cdot 2 e^{x} x + 2 e^{x} (3 e^{x}) - x (2 x) - x (3 e^{x}) + (- x^{2} - (3 e^{x})) (2 e^{x} - 1)}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.2.1.2

Multiply $2$ by $2$ .

$\frac{4 e^{x} x + 2 e^{x} (3 e^{x}) - x (2 x) - x (3 e^{x}) + (- x^{2} - (3 e^{x})) (2 e^{x} - 1)}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.2.1.3

Rewrite using the commutative property of multiplication.

$\frac{4 e^{x} x + 2 \cdot 3 e^{x} e^{x} - x (2 x) - x (3 e^{x}) + (- x^{2} - (3 e^{x})) (2 e^{x} - 1)}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.2.1.4

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

Tap for more steps...

Step 7.2.1.2.1.4.1

Move $e^{x}$ .

$\frac{4 e^{x} x + 2 \cdot 3 (e^{x} e^{x}) - x (2 x) - x (3 e^{x}) + (- x^{2} - (3 e^{x})) (2 e^{x} - 1)}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.2.1.4.2

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

$\frac{4 e^{x} x + 2 \cdot 3 e^{x + x} - x (2 x) - x (3 e^{x}) + (- x^{2} - (3 e^{x})) (2 e^{x} - 1)}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.2.1.4.3

Add $x$ and $x$ .

$\frac{4 e^{x} x + 2 \cdot 3 e^{2 x} - x (2 x) - x (3 e^{x}) + (- x^{2} - (3 e^{x})) (2 e^{x} - 1)}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.2.1.5

Multiply $2$ by $3$ .

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

Step 7.2.1.2.1.6

Rewrite using the commutative property of multiplication.

$\frac{4 e^{x} x + 6 e^{2 x} - 1 \cdot 2 x \cdot x - x (3 e^{x}) + (- x^{2} - (3 e^{x})) (2 e^{x} - 1)}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.2.1.7

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

Tap for more steps...

Step 7.2.1.2.1.7.1

Move $x$ .

$\frac{4 e^{x} x + 6 e^{2 x} - 1 \cdot 2 (x \cdot x) - x (3 e^{x}) + (- x^{2} - (3 e^{x})) (2 e^{x} - 1)}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.2.1.7.2

Multiply $x$ by $x$ .

$\frac{4 e^{x} x + 6 e^{2 x} - 1 \cdot 2 x^{2} - x (3 e^{x}) + (- x^{2} - (3 e^{x})) (2 e^{x} - 1)}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.2.1.8

Multiply $- 1$ by $2$ .

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

Step 7.2.1.2.1.9

Rewrite using the commutative property of multiplication.

$\frac{4 e^{x} x + 6 e^{2 x} - 2 x^{2} - 1 \cdot 3 x e^{x} + (- x^{2} - (3 e^{x})) (2 e^{x} - 1)}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.2.1.10

Multiply $- 1$ by $3$ .

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

Step 7.2.1.2.2

Subtract $3 x e^{x}$ from $4 e^{x} x$ .

Tap for more steps...

Step 7.2.1.2.2.1

Move $e^{x}$ .

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

Step 7.2.1.2.2.2

Subtract $3 x e^{x}$ from $4 x e^{x}$ .

$\frac{1 x e^{x} + 6 e^{2 x} - 2 x^{2} + (- x^{2} - (3 e^{x})) (2 e^{x} - 1)}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.3

Multiply $x$ by $1$ .

$\frac{x e^{x} + 6 e^{2 x} - 2 x^{2} + (- x^{2} - (3 e^{x})) (2 e^{x} - 1)}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.4

Multiply $3$ by $- 1$ .

$\frac{x e^{x} + 6 e^{2 x} - 2 x^{2} + (- x^{2} - 3 e^{x}) (2 e^{x} - 1)}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.5

Expand $(- x^{2} - 3 e^{x}) (2 e^{x} - 1)$ using the FOIL Method.

Tap for more steps...

Step 7.2.1.5.1

Apply the distributive property.

$\frac{x e^{x} + 6 e^{2 x} - 2 x^{2} - x^{2} (2 e^{x} - 1) - 3 e^{x} (2 e^{x} - 1)}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.5.2

Apply the distributive property.

$\frac{x e^{x} + 6 e^{2 x} - 2 x^{2} - x^{2} (2 e^{x}) - x^{2} \cdot - 1 - 3 e^{x} (2 e^{x} - 1)}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.5.3

Apply the distributive property.

$\frac{x e^{x} + 6 e^{2 x} - 2 x^{2} - x^{2} (2 e^{x}) - x^{2} \cdot - 1 - 3 e^{x} (2 e^{x}) - 3 e^{x} \cdot - 1}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.6

Simplify each term.

Tap for more steps...

Step 7.2.1.6.1

Rewrite using the commutative property of multiplication.

$\frac{x e^{x} + 6 e^{2 x} - 2 x^{2} - 1 \cdot 2 x^{2} e^{x} - x^{2} \cdot - 1 - 3 e^{x} (2 e^{x}) - 3 e^{x} \cdot - 1}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.6.2

Multiply $- 1$ by $2$ .

$\frac{x e^{x} + 6 e^{2 x} - 2 x^{2} - 2 x^{2} e^{x} - x^{2} \cdot - 1 - 3 e^{x} (2 e^{x}) - 3 e^{x} \cdot - 1}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.6.3

Multiply $- x^{2} \cdot - 1$ .

Tap for more steps...

Step 7.2.1.6.3.1

Multiply $- 1$ by $- 1$ .

$\frac{x e^{x} + 6 e^{2 x} - 2 x^{2} - 2 x^{2} e^{x} + 1 x^{2} - 3 e^{x} (2 e^{x}) - 3 e^{x} \cdot - 1}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.6.3.2

Multiply $x^{2}$ by $1$ .

$\frac{x e^{x} + 6 e^{2 x} - 2 x^{2} - 2 x^{2} e^{x} + x^{2} - 3 e^{x} (2 e^{x}) - 3 e^{x} \cdot - 1}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.6.4

Rewrite using the commutative property of multiplication.

$\frac{x e^{x} + 6 e^{2 x} - 2 x^{2} - 2 x^{2} e^{x} + x^{2} - 3 \cdot 2 e^{x} e^{x} - 3 e^{x} \cdot - 1}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.6.5

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

Tap for more steps...

Step 7.2.1.6.5.1

Move $e^{x}$ .

$\frac{x e^{x} + 6 e^{2 x} - 2 x^{2} - 2 x^{2} e^{x} + x^{2} - 3 \cdot 2 (e^{x} e^{x}) - 3 e^{x} \cdot - 1}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.6.5.2

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

$\frac{x e^{x} + 6 e^{2 x} - 2 x^{2} - 2 x^{2} e^{x} + x^{2} - 3 \cdot 2 e^{x + x} - 3 e^{x} \cdot - 1}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.6.5.3

Add $x$ and $x$ .

$\frac{x e^{x} + 6 e^{2 x} - 2 x^{2} - 2 x^{2} e^{x} + x^{2} - 3 \cdot 2 e^{2 x} - 3 e^{x} \cdot - 1}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.6.6

Multiply $- 3$ by $2$ .

$\frac{x e^{x} + 6 e^{2 x} - 2 x^{2} - 2 x^{2} e^{x} + x^{2} - 6 e^{2 x} - 3 e^{x} \cdot - 1}{{(2 e^{x} - x)}^{2}}$

Step 7.2.1.6.7

Multiply $- 1$ by $- 3$ .

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

Step 7.2.2

Combine the opposite terms in $x e^{x} + 6 e^{2 x} - 2 x^{2} - 2 x^{2} e^{x} + x^{2} - 6 e^{2 x} + 3 e^{x}$ .

Tap for more steps...

Step 7.2.2.1

Subtract $6 e^{2 x}$ from $6 e^{2 x}$ .

$\frac{x e^{x} - 2 x^{2} - 2 x^{2} e^{x} + x^{2} + 0 + 3 e^{x}}{{(2 e^{x} - x)}^{2}}$

Step 7.2.2.2

Add $x e^{x} - 2 x^{2} - 2 x^{2} e^{x} + x^{2}$ and $0$ .

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

Step 7.2.3

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

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

Step 7.3

Reorder terms.

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

Step 7.4

Factor $- 1$ out of $- x^{2}$ .

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

Step 7.5

Factor $- 1$ out of $e^{x} x$ .

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

Step 7.6

Factor $- 1$ out of $- (x^{2}) - (- e^{x} x)$ .

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

Step 7.7

Factor $- 1$ out of $- 2 e^{x} x^{2}$ .

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

Step 7.8

Factor $- 1$ out of $- (x^{2} - e^{x} x) - (2 e^{x} x^{2})$ .

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

Step 7.9

Factor $- 1$ out of $3 e^{x}$ .

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

Step 7.10

Factor $- 1$ out of $- (x^{2} - e^{x} x + 2 e^{x} x^{2}) - (- 3 e^{x})$ .

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

Step 7.11

Rewrite $- (x^{2} - e^{x} x + 2 e^{x} x^{2} - 3 e^{x})$ as $- 1 (x^{2} - e^{x} x + 2 e^{x} x^{2} - 3 e^{x})$ .

$\frac{- 1 (x^{2} - e^{x} x + 2 e^{x} x^{2} - 3 e^{x})}{{(- x + 2 e^{x})}^{2}}$

Step 7.12

Move the negative in front of the fraction.

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

Step 7.13

Reorder factors in $- \frac{x^{2} - e^{x} x + 2 e^{x} x^{2} - 3 e^{x}}{{(- x + 2 e^{x})}^{2}}$ .

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