Calculus Examples

$\frac{x}{y} + \sqrt{x + y} = e^{x y}$

Step 1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{x + y}$ as ${(x + y)}^{\frac{1}{2}}$ .

$\frac{x}{y} + {(x + y)}^{\frac{1}{2}} = e^{x y}$

Step 2

Differentiate both sides of the equation.

$\frac{d}{d x} (\frac{x}{y} + {(x + y)}^{\frac{1}{2}}) = \frac{d}{d x} (e^{x y})$

Step 3

Differentiate the left side of the equation.

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Step 3.1

By the Sum Rule, the derivative of $\frac{x}{y} + {(x + y)}^{\frac{1}{2}}$ with respect to $x$ is $\frac{d}{d x} [\frac{x}{y}] + \frac{d}{d x} [{(x + y)}^{\frac{1}{2}}]$ .

$\frac{d}{d x} [\frac{x}{y}] + \frac{d}{d x} [{(x + y)}^{\frac{1}{2}}]$

Step 3.2

Evaluate $\frac{d}{d x} [\frac{x}{y}]$ .

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Step 3.2.1

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 $f (x) = x$ and $g (x) = y$ .

$\frac{y \frac{d}{d x} [x] - x \frac{d}{d x} [y]}{y^{2}} + \frac{d}{d x} [{(x + y)}^{\frac{1}{2}}]$

Step 3.2.2

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

$\frac{y \cdot 1 - x \frac{d}{d x} [y]}{y^{2}} + \frac{d}{d x} [{(x + y)}^{\frac{1}{2}}]$

Step 3.2.3

Rewrite $\frac{d}{d x} [y]$ as $y'$ .

$\frac{y \cdot 1 - x y'}{y^{2}} + \frac{d}{d x} [{(x + y)}^{\frac{1}{2}}]$

Step 3.2.4

Multiply $y$ by $1$ .

$\frac{y - x y'}{y^{2}} + \frac{d}{d x} [{(x + y)}^{\frac{1}{2}}]$

Step 3.3

Evaluate $\frac{d}{d x} [{(x + y)}^{\frac{1}{2}}]$ .

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Step 3.3.1

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = x^{\frac{1}{2}}$ and $g (x) = x + y$ .

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Step 3.3.1.1

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

$\frac{y - x y'}{y^{2}} + \frac{d}{d u} [u^{\frac{1}{2}}] \frac{d}{d x} [x + y]$

Step 3.3.1.2

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

$\frac{y - x y'}{y^{2}} + \frac{1}{2} u^{\frac{1}{2} - 1} \frac{d}{d x} [x + y]$

Step 3.3.1.3

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

$\frac{y - x y'}{y^{2}} + \frac{1}{2} {(x + y)}^{\frac{1}{2} - 1} \frac{d}{d x} [x + y]$

Step 3.3.2

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

$\frac{y - x y'}{y^{2}} + \frac{1}{2} {(x + y)}^{\frac{1}{2} - 1} (\frac{d}{d x} [x] + \frac{d}{d x} [y])$

Step 3.3.3

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

$\frac{y - x y'}{y^{2}} + \frac{1}{2} {(x + y)}^{\frac{1}{2} - 1} (1 + \frac{d}{d x} [y])$

Step 3.3.4

Rewrite $\frac{d}{d x} [y]$ as $y'$ .

$\frac{y - x y'}{y^{2}} + \frac{1}{2} {(x + y)}^{\frac{1}{2} - 1} (1 + y')$

Step 3.3.5

To write $- 1$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$\frac{y - x y'}{y^{2}} + \frac{1}{2} {(x + y)}^{\frac{1}{2} - 1 \cdot \frac{2}{2}} (1 + y')$

Step 3.3.6

Combine $- 1$ and $\frac{2}{2}$ .

$\frac{y - x y'}{y^{2}} + \frac{1}{2} {(x + y)}^{\frac{1}{2} + \frac{- 1 \cdot 2}{2}} (1 + y')$

Step 3.3.7

Combine the numerators over the common denominator.

$\frac{y - x y'}{y^{2}} + \frac{1}{2} {(x + y)}^{\frac{1 - 1 \cdot 2}{2}} (1 + y')$

Step 3.3.8

Simplify the numerator.

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Step 3.3.8.1

Multiply $- 1$ by $2$ .

$\frac{y - x y'}{y^{2}} + \frac{1}{2} {(x + y)}^{\frac{1 - 2}{2}} (1 + y')$

Step 3.3.8.2

Subtract $2$ from $1$ .

$\frac{y - x y'}{y^{2}} + \frac{1}{2} {(x + y)}^{\frac{- 1}{2}} (1 + y')$

Step 3.3.9

Move the negative in front of the fraction.

$\frac{y - x y'}{y^{2}} + \frac{1}{2} {(x + y)}^{- \frac{1}{2}} (1 + y')$

Step 3.3.10

Combine $\frac{1}{2}$ and ${(x + y)}^{- \frac{1}{2}}$ .

$\frac{y - x y'}{y^{2}} + \frac{{(x + y)}^{- \frac{1}{2}}}{2} (1 + y')$

Step 3.3.11

Move ${(x + y)}^{- \frac{1}{2}}$ to the denominator using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$\frac{y - x y'}{y^{2}} + \frac{1}{2 {(x + y)}^{\frac{1}{2}}} (1 + y')$

Step 3.4

Simplify.

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Step 3.4.1

Combine terms.

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Step 3.4.1.1

To write $\frac{1}{2 {(x + y)}^{\frac{1}{2}}} (1 + y')$ as a fraction with a common denominator, multiply by $\frac{y^{2}}{y^{2}}$ .

$\frac{y - x y'}{y^{2}} + \frac{1}{2 {(x + y)}^{\frac{1}{2}}} (1 + y') \cdot \frac{y^{2}}{y^{2}}$

Step 3.4.1.2

Combine $\frac{1}{2 {(x + y)}^{\frac{1}{2}}} (1 + y')$ and $\frac{y^{2}}{y^{2}}$ .

$\frac{y - x y'}{y^{2}} + \frac{\frac{1}{2 {(x + y)}^{\frac{1}{2}}} (1 + y') y^{2}}{y^{2}}$

Step 3.4.1.3

Combine the numerators over the common denominator.

$\frac{y - x y' + \frac{1}{2 {(x + y)}^{\frac{1}{2}}} (1 + y') y^{2}}{y^{2}}$

Step 3.4.1.4

Combine $y^{2}$ and $\frac{1}{2 {(x + y)}^{\frac{1}{2}}}$ .

$\frac{y - x y' + \frac{y^{2}}{2 {(x + y)}^{\frac{1}{2}}} (1 + y')}{y^{2}}$

Step 3.4.2

Reorder terms.

$\frac{- x y' + (1 + y') \frac{y^{2}}{2 {(x + y)}^{\frac{1}{2}}} + y}{y^{2}}$

Step 4

Differentiate the right side of the equation.

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Step 4.1

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

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Step 4.1.1

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

$\frac{d}{d u} [e^{u}] \frac{d}{d x} [x y]$

Step 4.1.2

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

$e^{u} \frac{d}{d x} [x y]$

Step 4.1.3

Replace all occurrences of $u$ with $x y$ .

$e^{x y} \frac{d}{d x} [x y]$

Step 4.2

Differentiate using the Product Rule which states that $\frac{d}{d x} [f (x) g (x)]$ is $f (x) \frac{d}{d x} [g (x)] + g (x) \frac{d}{d x} [f (x)]$ where $f (x) = x$ and $g (x) = y$ .

$e^{x y} (x \frac{d}{d x} [y] + y \frac{d}{d x} [x])$

Step 4.3

Rewrite $\frac{d}{d x} [y]$ as $y'$ .

$e^{x y} (x y' + y \frac{d}{d x} [x])$

Step 4.4

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

$e^{x y} (x y' + y \cdot 1)$

Step 4.5

Multiply $y$ by $1$ .

$e^{x y} (x y' + y)$

Step 4.6

Simplify.

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Step 4.6.1

Apply the distributive property.

$e^{x y} (x y') + e^{x y} y$

Step 4.6.2

Reorder terms.

$e^{x y} x y' + e^{x y} y$

Step 5

Reform the equation by setting the left side equal to the right side.

$\frac{- x y' + (1 + y') (\frac{y^{2}}{2 {(x + y)}^{\frac{1}{2}}}) + y}{y^{2}} = e^{x y} x y' + e^{x y} y$

Step 6

Solve for $y'$ .

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Step 6.1

Multiply both sides by $y^{2}$ .

$\frac{- x y' + (1 + y') \frac{y^{2}}{2 {(x + y)}^{\frac{1}{2}}} + y}{y^{2}} y^{2} = (e^{x y} x y' + e^{x y} y) y^{2}$

Step 6.2

Simplify.

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Step 6.2.1

Simplify the left side.

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Step 6.2.1.1

Simplify $\frac{- x y' + (1 + y') \frac{y^{2}}{2 {(x + y)}^{\frac{1}{2}}} + y}{y^{2}} y^{2}$ .

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Step 6.2.1.1.1

Cancel the common factor of $y^{2}$ .

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Step 6.2.1.1.1.1

Cancel the common factor.

$\frac{- x y' + (1 + y') \frac{y^{2}}{2 {(x + y)}^{\frac{1}{2}}} + y}{y^{2}} y^{2} = (e^{x y} x y' + e^{x y} y) y^{2}$

Step 6.2.1.1.1.2

Rewrite the expression.

$- x y' + (1 + y') \frac{y^{2}}{2 {(x + y)}^{\frac{1}{2}}} + y = (e^{x y} x y' + e^{x y} y) y^{2}$

Step 6.2.1.1.2

Multiply $1 + y'$ by $\frac{y^{2}}{2 {(x + y)}^{\frac{1}{2}}}$ .

$- x y' + \frac{(1 + y') y^{2}}{2 {(x + y)}^{\frac{1}{2}}} + y = (e^{x y} x y' + e^{x y} y) y^{2}$

Step 6.2.1.1.3

To write $- x y'$ as a fraction with a common denominator, multiply by $\frac{2 {(x + y)}^{\frac{1}{2}}}{2 {(x + y)}^{\frac{1}{2}}}$ .

$- x y' \cdot \frac{2 {(x + y)}^{\frac{1}{2}}}{2 {(x + y)}^{\frac{1}{2}}} + \frac{(1 + y') y^{2}}{2 {(x + y)}^{\frac{1}{2}}} + y = (e^{x y} x y' + e^{x y} y) y^{2}$

Step 6.2.1.1.4

Simplify terms.

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Step 6.2.1.1.4.1

Combine $- x y'$ and $\frac{2 {(x + y)}^{\frac{1}{2}}}{2 {(x + y)}^{\frac{1}{2}}}$ .

$\frac{- x y' (2 {(x + y)}^{\frac{1}{2}})}{2 {(x + y)}^{\frac{1}{2}}} + \frac{(1 + y') y^{2}}{2 {(x + y)}^{\frac{1}{2}}} + y = (e^{x y} x y' + e^{x y} y) y^{2}$

Step 6.2.1.1.4.2

Combine the numerators over the common denominator.

$\frac{- x y' (2 {(x + y)}^{\frac{1}{2}}) + (1 + y') y^{2}}{2 {(x + y)}^{\frac{1}{2}}} + y = (e^{x y} x y' + e^{x y} y) y^{2}$

Step 6.2.1.1.5

Simplify the numerator.

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Step 6.2.1.1.5.1

Multiply $2$ by $- 1$ .

$\frac{- 2 x y' {(x + y)}^{\frac{1}{2}} + (1 + y') y^{2}}{2 {(x + y)}^{\frac{1}{2}}} + y = (e^{x y} x y' + e^{x y} y) y^{2}$

Step 6.2.1.1.5.2

Apply the distributive property.

$\frac{- 2 x y' {(x + y)}^{\frac{1}{2}} + 1 y^{2} + y' y^{2}}{2 {(x + y)}^{\frac{1}{2}}} + y = (e^{x y} x y' + e^{x y} y) y^{2}$

Step 6.2.1.1.5.3

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

$\frac{- 2 x y' {(x + y)}^{\frac{1}{2}} + y^{2} + y' y^{2}}{2 {(x + y)}^{\frac{1}{2}}} + y = (e^{x y} x y' + e^{x y} y) y^{2}$

Step 6.2.1.1.6

To write $y$ as a fraction with a common denominator, multiply by $\frac{2 {(x + y)}^{\frac{1}{2}}}{2 {(x + y)}^{\frac{1}{2}}}$ .

$\frac{- 2 x y' {(x + y)}^{\frac{1}{2}} + y^{2} + y' y^{2}}{2 {(x + y)}^{\frac{1}{2}}} + y \cdot \frac{2 {(x + y)}^{\frac{1}{2}}}{2 {(x + y)}^{\frac{1}{2}}} = (e^{x y} x y' + e^{x y} y) y^{2}$

Step 6.2.1.1.7

Combine $y$ and $\frac{2 {(x + y)}^{\frac{1}{2}}}{2 {(x + y)}^{\frac{1}{2}}}$ .

$\frac{- 2 x y' {(x + y)}^{\frac{1}{2}} + y^{2} + y' y^{2}}{2 {(x + y)}^{\frac{1}{2}}} + \frac{y (2 {(x + y)}^{\frac{1}{2}})}{2 {(x + y)}^{\frac{1}{2}}} = (e^{x y} x y' + e^{x y} y) y^{2}$

Step 6.2.1.1.8

Combine the numerators over the common denominator.

$\frac{- 2 x y' {(x + y)}^{\frac{1}{2}} + y^{2} + y' y^{2} + y (2 {(x + y)}^{\frac{1}{2}})}{2 {(x + y)}^{\frac{1}{2}}} = (e^{x y} x y' + e^{x y} y) y^{2}$

Step 6.2.1.1.9

Rewrite using the commutative property of multiplication.

$\frac{- 2 x y' {(x + y)}^{\frac{1}{2}} + y^{2} + y' y^{2} + 2 y {(x + y)}^{\frac{1}{2}}}{2 {(x + y)}^{\frac{1}{2}}} = (e^{x y} x y' + e^{x y} y) y^{2}$

Step 6.2.1.1.10

Factor $- 1$ out of $- 2 x y' {(x + y)}^{\frac{1}{2}}$ .

$\frac{- (2 x y' {(x + y)}^{\frac{1}{2}}) + y^{2} + y' y^{2} + 2 y {(x + y)}^{\frac{1}{2}}}{2 {(x + y)}^{\frac{1}{2}}} = (e^{x y} x y' + e^{x y} y) y^{2}$

Step 6.2.1.1.11

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

$\frac{- (2 x y' {(x + y)}^{\frac{1}{2}}) - 1 (- y^{2}) + y' y^{2} + 2 y {(x + y)}^{\frac{1}{2}}}{2 {(x + y)}^{\frac{1}{2}}} = (e^{x y} x y' + e^{x y} y) y^{2}$

Step 6.2.1.1.12

Factor $- 1$ out of $- (2 x y' {(x + y)}^{\frac{1}{2}}) - 1 (- y^{2})$ .

$\frac{- (2 x y' {(x + y)}^{\frac{1}{2}} - y^{2}) + y' y^{2} + 2 y {(x + y)}^{\frac{1}{2}}}{2 {(x + y)}^{\frac{1}{2}}} = (e^{x y} x y' + e^{x y} y) y^{2}$

Step 6.2.1.1.13

Factor $- 1$ out of $y' y^{2}$ .

$\frac{- (2 x y' {(x + y)}^{\frac{1}{2}} - y^{2}) - (- y' y^{2}) + 2 y {(x + y)}^{\frac{1}{2}}}{2 {(x + y)}^{\frac{1}{2}}} = (e^{x y} x y' + e^{x y} y) y^{2}$

Step 6.2.1.1.14

Factor $- 1$ out of $- (2 x y' {(x + y)}^{\frac{1}{2}} - y^{2}) - (- y' y^{2})$ .

$\frac{- (2 x y' {(x + y)}^{\frac{1}{2}} - y^{2} - y' y^{2}) + 2 y {(x + y)}^{\frac{1}{2}}}{2 {(x + y)}^{\frac{1}{2}}} = (e^{x y} x y' + e^{x y} y) y^{2}$

Step 6.2.1.1.15

Factor $- 1$ out of $2 y {(x + y)}^{\frac{1}{2}}$ .

$\frac{- (2 x y' {(x + y)}^{\frac{1}{2}} - y^{2} - y' y^{2}) - (- 2 y {(x + y)}^{\frac{1}{2}})}{2 {(x + y)}^{\frac{1}{2}}} = (e^{x y} x y' + e^{x y} y) y^{2}$

Step 6.2.1.1.16

Factor $- 1$ out of $- (2 x y' {(x + y)}^{\frac{1}{2}} - y^{2} - y' y^{2}) - (- 2 y {(x + y)}^{\frac{1}{2}})$ .

$\frac{- (2 x y' {(x + y)}^{\frac{1}{2}} - y^{2} - y' y^{2} - 2 y {(x + y)}^{\frac{1}{2}})}{2 {(x + y)}^{\frac{1}{2}}} = (e^{x y} x y' + e^{x y} y) y^{2}$

Step 6.2.1.1.17

Simplify the expression.

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Step 6.2.1.1.17.1

Rewrite $- (2 x y' {(x + y)}^{\frac{1}{2}} - y^{2} - y' y^{2} - 2 y {(x + y)}^{\frac{1}{2}})$ as $- 1 (2 x y' {(x + y)}^{\frac{1}{2}} - y^{2} - y' y^{2} - 2 y {(x + y)}^{\frac{1}{2}})$ .

$\frac{- 1 (2 x y' {(x + y)}^{\frac{1}{2}} - y^{2} - y' y^{2} - 2 y {(x + y)}^{\frac{1}{2}})}{2 {(x + y)}^{\frac{1}{2}}} = (e^{x y} x y' + e^{x y} y) y^{2}$

Step 6.2.1.1.17.2

Move the negative in front of the fraction.

$- \frac{2 x y' {(x + y)}^{\frac{1}{2}} - y^{2} - y' y^{2} - 2 y {(x + y)}^{\frac{1}{2}}}{2 {(x + y)}^{\frac{1}{2}}} = (e^{x y} x y' + e^{x y} y) y^{2}$

Step 6.2.2

Simplify the right side.

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Step 6.2.2.1

Simplify $(e^{x y} x y' + e^{x y} y) y^{2}$ .

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Step 6.2.2.1.1

Apply the distributive property.

$- \frac{2 x y' {(x + y)}^{\frac{1}{2}} - y^{2} - y' y^{2} - 2 y {(x + y)}^{\frac{1}{2}}}{2 {(x + y)}^{\frac{1}{2}}} = e^{x y} x y' y^{2} + e^{x y} y \cdot y^{2}$

Step 6.2.2.1.2

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

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Step 6.2.2.1.2.1

Move $y^{2}$ .

$- \frac{2 x y' {(x + y)}^{\frac{1}{2}} - y^{2} - y' y^{2} - 2 y {(x + y)}^{\frac{1}{2}}}{2 {(x + y)}^{\frac{1}{2}}} = e^{x y} x y' y^{2} + e^{x y} (y^{2} y)$

Step 6.2.2.1.2.2

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

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Step 6.2.2.1.2.2.1

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

$- \frac{2 x y' {(x + y)}^{\frac{1}{2}} - y^{2} - y' y^{2} - 2 y {(x + y)}^{\frac{1}{2}}}{2 {(x + y)}^{\frac{1}{2}}} = e^{x y} x y' y^{2} + e^{x y} (y^{2} y^{1})$

Step 6.2.2.1.2.2.2

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

$- \frac{2 x y' {(x + y)}^{\frac{1}{2}} - y^{2} - y' y^{2} - 2 y {(x + y)}^{\frac{1}{2}}}{2 {(x + y)}^{\frac{1}{2}}} = e^{x y} x y' y^{2} + e^{x y} y^{2 + 1}$

Step 6.2.2.1.2.3

Add $2$ and $1$ .

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

Step 6.2.2.1.3

Reorder factors in $e^{x y} x y' y^{2} + e^{x y} y^{3}$ .

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

Step 6.2.2.1.4

Reorder $x$ and $y'$ .

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

Step 6.3

Solve for $y'$ .

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Step 6.3.1

Multiply both sides by $2 {(x + y)}^{\frac{1}{2}}$ .

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

Step 6.3.2

Simplify.

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Step 6.3.2.1

Simplify the left side.

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Step 6.3.2.1.1

Simplify $- \frac{2 x y' {(x + y)}^{\frac{1}{2}} - y^{2} - y' y^{2} - 2 y {(x + y)}^{\frac{1}{2}}}{2 {(x + y)}^{\frac{1}{2}}} (2 {(x + y)}^{\frac{1}{2}})$ .

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Step 6.3.2.1.1.1

Cancel the common factor of $2 {(x + y)}^{\frac{1}{2}}$ .

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Step 6.3.2.1.1.1.1

Move the leading negative in $- \frac{2 x y' {(x + y)}^{\frac{1}{2}} - y^{2} - y' y^{2} - 2 y {(x + y)}^{\frac{1}{2}}}{2 {(x + y)}^{\frac{1}{2}}}$ into the numerator.

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

Step 6.3.2.1.1.1.2

Cancel the common factor.

Step 6.3.2.1.1.1.3

Rewrite the expression.

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

Step 6.3.2.1.1.2

Apply the distributive property.

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

Step 6.3.2.1.1.3

Simplify.

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Step 6.3.2.1.1.3.1

Multiply $2$ by $- 1$ .

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

Step 6.3.2.1.1.3.2

Multiply $- - y^{2}$ .

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Step 6.3.2.1.1.3.2.1

Multiply $- 1$ by $- 1$ .

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

Step 6.3.2.1.1.3.2.2

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

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

Step 6.3.2.1.1.3.3

Multiply $- (- y' y^{2})$ .

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Step 6.3.2.1.1.3.3.1

Multiply $- 1$ by $- 1$ .

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

Step 6.3.2.1.1.3.3.2

Multiply $y'$ by $1$ .

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

Step 6.3.2.1.1.3.4

Multiply $- 2$ by $- 1$ .

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

Step 6.3.2.1.1.4

Remove parentheses.

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

Step 6.3.2.1.1.5

Simplify the expression.

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Step 6.3.2.1.1.5.1

Move $x$ .

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

Step 6.3.2.1.1.5.2

Move $- 2 y' x {(x + y)}^{\frac{1}{2}}$ .

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

Step 6.3.2.1.1.5.3

Reorder $y^{2}$ and $y' y^{2}$ .

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

Step 6.3.2.2

Simplify the right side.

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Step 6.3.2.2.1

Simplify $(y' x y^{2} e^{x y} + y^{3} e^{x y}) (2 {(x + y)}^{\frac{1}{2}})$ .

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Step 6.3.2.2.1.1

Apply the distributive property.

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

Step 6.3.2.2.1.2

Reorder.

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Step 6.3.2.2.1.2.1

Rewrite using the commutative property of multiplication.

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

Step 6.3.2.2.1.2.2

Rewrite using the commutative property of multiplication.

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

Step 6.3.3

Solve for $y'$ .

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Step 6.3.3.1

Subtract $2 y' x y^{2} e^{x y} {(x + y)}^{\frac{1}{2}}$ from both sides of the equation.

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

Step 6.3.3.2

Move all terms not containing $y'$ to the right side of the equation.

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Step 6.3.3.2.1

Subtract $y^{2}$ from both sides of the equation.

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

Step 6.3.3.2.2

Subtract $2 y {(x + y)}^{\frac{1}{2}}$ from both sides of the equation.

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

Step 6.3.3.3

Factor $y'$ out of $y' y^{2} - 2 y' x {(x + y)}^{\frac{1}{2}} - 2 y' x y^{2} e^{x y} {(x + y)}^{\frac{1}{2}}$ .

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Step 6.3.3.3.1

Factor $y'$ out of $y' y^{2}$ .

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

Step 6.3.3.3.2

Factor $y'$ out of $- 2 y' x {(x + y)}^{\frac{1}{2}}$ .

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

Step 6.3.3.3.3

Factor $y'$ out of $- 2 y' x y^{2} e^{x y} {(x + y)}^{\frac{1}{2}}$ .

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

Step 6.3.3.3.4

Factor $y'$ out of $y' (y^{2}) + y' (- 2 x {(x + y)}^{\frac{1}{2}})$ .

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

Step 6.3.3.3.5

Factor $y'$ out of $y' (y^{2} - 2 x {(x + y)}^{\frac{1}{2}}) + y' (- 2 x y^{2} e^{x y} {(x + y)}^{\frac{1}{2}})$ .

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

Step 6.3.3.4

Divide each term in $y' (y^{2} - 2 x {(x + y)}^{\frac{1}{2}} - 2 x y^{2} e^{x y} {(x + y)}^{\frac{1}{2}}) = 2 y^{3} e^{x y} {(x + y)}^{\frac{1}{2}} - y^{2} - 2 y {(x + y)}^{\frac{1}{2}}$ by $y^{2} - 2 x {(x + y)}^{\frac{1}{2}} - 2 x y^{2} e^{x y} {(x + y)}^{\frac{1}{2}}$ and simplify.

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Step 6.3.3.4.1

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

Step 6.3.3.4.2

Simplify the left side.

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Step 6.3.3.4.2.1

Cancel the common factor.

Step 6.3.3.4.2.2

Divide $y'$ by $1$ .

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

Step 6.3.3.4.3

Simplify the right side.

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Step 6.3.3.4.3.1

Simplify each term.

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Step 6.3.3.4.3.1.1

Move the negative in front of the fraction.

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

Step 6.3.3.4.3.1.2

Move the negative in front of the fraction.

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

Step 6.3.3.4.3.2

Simplify terms.

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Step 6.3.3.4.3.2.1

Combine the numerators over the common denominator.

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

Step 6.3.3.4.3.2.2

Combine the numerators over the common denominator.

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

Step 6.3.3.4.3.2.3

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

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Step 6.3.3.4.3.2.3.1

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

$y' = \frac{y (2 y^{2} e^{x y} {(x + y)}^{\frac{1}{2}}) - y^{2} - 2 y {(x + y)}^{\frac{1}{2}}}{y^{2} - 2 x {(x + y)}^{\frac{1}{2}} - 2 x y^{2} e^{x y} {(x + y)}^{\frac{1}{2}}}$

Step 6.3.3.4.3.2.3.2

Factor $y$ out of $- y^{2}$ .

$y' = \frac{y (2 y^{2} e^{x y} {(x + y)}^{\frac{1}{2}}) + y (- y) - 2 y {(x + y)}^{\frac{1}{2}}}{y^{2} - 2 x {(x + y)}^{\frac{1}{2}} - 2 x y^{2} e^{x y} {(x + y)}^{\frac{1}{2}}}$

Step 6.3.3.4.3.2.3.3

Factor $y$ out of $- 2 y {(x + y)}^{\frac{1}{2}}$ .

$y' = \frac{y (2 y^{2} e^{x y} {(x + y)}^{\frac{1}{2}}) + y (- y) + y (- 2 {(x + y)}^{\frac{1}{2}})}{y^{2} - 2 x {(x + y)}^{\frac{1}{2}} - 2 x y^{2} e^{x y} {(x + y)}^{\frac{1}{2}}}$

Step 6.3.3.4.3.2.3.4

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

$y' = \frac{y (2 y^{2} e^{x y} {(x + y)}^{\frac{1}{2}} - y) + y (- 2 {(x + y)}^{\frac{1}{2}})}{y^{2} - 2 x {(x + y)}^{\frac{1}{2}} - 2 x y^{2} e^{x y} {(x + y)}^{\frac{1}{2}}}$

Step 6.3.3.4.3.2.3.5

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

$y' = \frac{y (2 y^{2} e^{x y} {(x + y)}^{\frac{1}{2}} - y - 2 {(x + y)}^{\frac{1}{2}})}{y^{2} - 2 x {(x + y)}^{\frac{1}{2}} - 2 x y^{2} e^{x y} {(x + y)}^{\frac{1}{2}}}$

Step 7

Replace $y'$ with $\frac{d y}{d x}$ .

$\frac{d y}{d x} = \frac{y (2 y^{2} e^{x y} {(x + y)}^{\frac{1}{2}} - y - 2 {(x + y)}^{\frac{1}{2}})}{y^{2} - 2 x {(x + y)}^{\frac{1}{2}} - 2 x y^{2} e^{x y} {(x + y)}^{\frac{1}{2}}}$