Calculus Examples

${(x - y)}^{3} + {(x + y)}^{3} = x^{5} + y^{5}$

Step 1

Differentiate both sides of the equation.

$\frac{d}{d y} ({(x - y)}^{3} + {(x + y)}^{3}) = \frac{d}{d y} (x^{5} + y^{5})$

Step 2

Differentiate the left side of the equation.

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Step 2.1

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

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

Step 2.2

Evaluate $\frac{d}{d y} [{(x - y)}^{3}]$ .

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Step 2.2.1

Differentiate using the chain rule, which states that $\frac{d}{d y} [f (g (y))]$ is $f' (g (y)) g' (y)$ where $f (y) = y^{3}$ and $g (y) = x - y$ .

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Step 2.2.1.1

To apply the Chain Rule, set $u_{1}$ as $x - y$ .

$\frac{d}{d u_{1}} [{u_{1}}^{3}] \frac{d}{d y} [x - y] + \frac{d}{d y} [{(x + y)}^{3}]$

Step 2.2.1.2

Differentiate using the Power Rule which states that $\frac{d}{d u_{1}} [{u_{1}}^{n}]$ is $n {u_{1}}^{n - 1}$ where $n = 3$ .

$3 {u_{1}}^{2} \frac{d}{d y} [x - y] + \frac{d}{d y} [{(x + y)}^{3}]$

Step 2.2.1.3

Replace all occurrences of $u_{1}$ with $x - y$ .

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

Step 2.2.2

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

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

Step 2.2.3

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

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

Step 2.2.4

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

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

Step 2.2.5

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

$3 {(x - y)}^{2} (x' - 1 \cdot 1) + \frac{d}{d y} [{(x + y)}^{3}]$

Step 2.2.6

Multiply $- 1$ by $1$ .

$3 {(x - y)}^{2} (x' - 1) + \frac{d}{d y} [{(x + y)}^{3}]$

Step 2.3

Evaluate $\frac{d}{d y} [{(x + y)}^{3}]$ .

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Step 2.3.1

Differentiate using the chain rule, which states that $\frac{d}{d y} [f (g (y))]$ is $f' (g (y)) g' (y)$ where $f (y) = y^{3}$ and $g (y) = x + y$ .

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Step 2.3.1.1

To apply the Chain Rule, set $u_{2}$ as $x + y$ .

$3 {(x - y)}^{2} (x' - 1) + \frac{d}{d u_{2}} [{u_{2}}^{3}] \frac{d}{d y} [x + y]$

Step 2.3.1.2

Differentiate using the Power Rule which states that $\frac{d}{d u_{2}} [{u_{2}}^{n}]$ is $n {u_{2}}^{n - 1}$ where $n = 3$ .

$3 {(x - y)}^{2} (x' - 1) + 3 {u_{2}}^{2} \frac{d}{d y} [x + y]$

Step 2.3.1.3

Replace all occurrences of $u_{2}$ with $x + y$ .

$3 {(x - y)}^{2} (x' - 1) + 3 {(x + y)}^{2} \frac{d}{d y} [x + y]$

Step 2.3.2

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

$3 {(x - y)}^{2} (x' - 1) + 3 {(x + y)}^{2} (\frac{d}{d y} [x] + \frac{d}{d y} [y])$

Step 2.3.3

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

$3 {(x - y)}^{2} (x' - 1) + 3 {(x + y)}^{2} (x' + \frac{d}{d y} [y])$

Step 2.3.4

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

$3 {(x - y)}^{2} (x' - 1) + 3 {(x + y)}^{2} (x' + 1)$

Step 2.4

Simplify.

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Step 2.4.1

Apply the distributive property.

$3 {(x - y)}^{2} x' + 3 {(x - y)}^{2} \cdot - 1 + 3 {(x + y)}^{2} (x' + 1)$

Step 2.4.2

Apply the distributive property.

$3 {(x - y)}^{2} x' + 3 {(x - y)}^{2} \cdot - 1 + 3 {(x + y)}^{2} x' + 3 {(x + y)}^{2} \cdot 1$

Step 2.4.3

Combine terms.

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Step 2.4.3.1

Multiply $- 1$ by $3$ .

$3 {(x - y)}^{2} x' - 3 {(x - y)}^{2} + 3 {(x + y)}^{2} x' + 3 {(x + y)}^{2} \cdot 1$

Step 2.4.3.2

Multiply $3$ by $1$ .

$3 {(x - y)}^{2} x' - 3 {(x - y)}^{2} + 3 {(x + y)}^{2} x' + 3 {(x + y)}^{2}$

Step 2.4.4

Reorder terms.

$3 {(x + y)}^{2} - 3 {(x - y)}^{2} + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5

Simplify each term.

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Step 2.4.5.1

Rewrite ${(x + y)}^{2}$ as $(x + y) (x + y)$ .

$3 ((x + y) (x + y)) - 3 {(x - y)}^{2} + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.2

Expand $(x + y) (x + y)$ using the FOIL Method.

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Step 2.4.5.2.1

Apply the distributive property.

$3 (x (x + y) + y (x + y)) - 3 {(x - y)}^{2} + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.2.2

Apply the distributive property.

$3 (x \cdot x + x y + y (x + y)) - 3 {(x - y)}^{2} + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.2.3

Apply the distributive property.

$3 (x \cdot x + x y + y x + y \cdot y) - 3 {(x - y)}^{2} + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.3

Simplify and combine like terms.

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Step 2.4.5.3.1

Simplify each term.

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Step 2.4.5.3.1.1

Multiply $x$ by $x$ .

$3 (x^{2} + x y + y x + y \cdot y) - 3 {(x - y)}^{2} + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.3.1.2

Multiply $y$ by $y$ .

$3 (x^{2} + x y + y x + y^{2}) - 3 {(x - y)}^{2} + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.3.2

Add $x y$ and $y x$ .

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Step 2.4.5.3.2.1

Reorder $y$ and $x$ .

$3 (x^{2} + x y + x y + y^{2}) - 3 {(x - y)}^{2} + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.3.2.2

Add $x y$ and $x y$ .

$3 (x^{2} + 2 x y + y^{2}) - 3 {(x - y)}^{2} + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.4

Apply the distributive property.

$3 x^{2} + 3 (2 x y) + 3 y^{2} - 3 {(x - y)}^{2} + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.5

Multiply $2$ by $3$ .

$3 x^{2} + 6 (x y) + 3 y^{2} - 3 {(x - y)}^{2} + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.6

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

$3 x^{2} + 6 x y + 3 y^{2} - 3 ((x - y) (x - y)) + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.7

Expand $(x - y) (x - y)$ using the FOIL Method.

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Step 2.4.5.7.1

Apply the distributive property.

$3 x^{2} + 6 x y + 3 y^{2} - 3 (x (x - y) - y (x - y)) + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.7.2

Apply the distributive property.

$3 x^{2} + 6 x y + 3 y^{2} - 3 (x \cdot x + x (- y) - y (x - y)) + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.7.3

Apply the distributive property.

$3 x^{2} + 6 x y + 3 y^{2} - 3 (x \cdot x + x (- y) - y x - y (- y)) + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.8

Simplify and combine like terms.

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Step 2.4.5.8.1

Simplify each term.

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Step 2.4.5.8.1.1

Multiply $x$ by $x$ .

$3 x^{2} + 6 x y + 3 y^{2} - 3 (x^{2} + x (- y) - y x - y (- y)) + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.8.1.2

Rewrite using the commutative property of multiplication.

$3 x^{2} + 6 x y + 3 y^{2} - 3 (x^{2} - x y - y x - y (- y)) + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.8.1.3

Rewrite using the commutative property of multiplication.

$3 x^{2} + 6 x y + 3 y^{2} - 3 (x^{2} - x y - y x - 1 \cdot - 1 y \cdot y) + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.8.1.4

Multiply $y$ by $y$ by adding the exponents.

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Step 2.4.5.8.1.4.1

Move $y$ .

$3 x^{2} + 6 x y + 3 y^{2} - 3 (x^{2} - x y - y x - 1 \cdot - 1 (y \cdot y)) + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.8.1.4.2

Multiply $y$ by $y$ .

$3 x^{2} + 6 x y + 3 y^{2} - 3 (x^{2} - x y - y x - 1 \cdot - 1 y^{2}) + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.8.1.5

Multiply $- 1$ by $- 1$ .

$3 x^{2} + 6 x y + 3 y^{2} - 3 (x^{2} - x y - y x + 1 y^{2}) + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.8.1.6

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

$3 x^{2} + 6 x y + 3 y^{2} - 3 (x^{2} - x y - y x + y^{2}) + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.8.2

Subtract $y x$ from $- x y$ .

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Step 2.4.5.8.2.1

Move $y$ .

$3 x^{2} + 6 x y + 3 y^{2} - 3 (x^{2} - x y - 1 x y + y^{2}) + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.8.2.2

Subtract $x y$ from $- x y$ .

$3 x^{2} + 6 x y + 3 y^{2} - 3 (x^{2} - 2 x y + y^{2}) + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.9

Apply the distributive property.

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} - 3 (- 2 x y) - 3 y^{2} + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.10

Multiply $- 2$ by $- 3$ .

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 (x y) - 3 y^{2} + 3 {(x - y)}^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.11

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

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 ((x - y) (x - y)) x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.12

Expand $(x - y) (x - y)$ using the FOIL Method.

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Step 2.4.5.12.1

Apply the distributive property.

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 (x (x - y) - y (x - y)) x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.12.2

Apply the distributive property.

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 (x \cdot x + x (- y) - y (x - y)) x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.12.3

Apply the distributive property.

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 (x \cdot x + x (- y) - y x - y (- y)) x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.13

Simplify and combine like terms.

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Step 2.4.5.13.1

Simplify each term.

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Step 2.4.5.13.1.1

Multiply $x$ by $x$ .

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 (x^{2} + x (- y) - y x - y (- y)) x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.13.1.2

Rewrite using the commutative property of multiplication.

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 (x^{2} - x y - y x - y (- y)) x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.13.1.3

Rewrite using the commutative property of multiplication.

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 (x^{2} - x y - y x - 1 \cdot - 1 y \cdot y) x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.13.1.4

Multiply $y$ by $y$ by adding the exponents.

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Step 2.4.5.13.1.4.1

Move $y$ .

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 (x^{2} - x y - y x - 1 \cdot - 1 (y \cdot y)) x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.13.1.4.2

Multiply $y$ by $y$ .

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 (x^{2} - x y - y x - 1 \cdot - 1 y^{2}) x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.13.1.5

Multiply $- 1$ by $- 1$ .

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 (x^{2} - x y - y x + 1 y^{2}) x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.13.1.6

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

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 (x^{2} - x y - y x + y^{2}) x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.13.2

Subtract $y x$ from $- x y$ .

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Step 2.4.5.13.2.1

Move $y$ .

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 (x^{2} - x y - 1 x y + y^{2}) x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.13.2.2

Subtract $x y$ from $- x y$ .

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 (x^{2} - 2 x y + y^{2}) x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.14

Apply the distributive property.

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + (3 x^{2} + 3 (- 2 x y) + 3 y^{2}) x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.15

Multiply $- 2$ by $3$ .

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + (3 x^{2} - 6 (x y) + 3 y^{2}) x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.16

Apply the distributive property.

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 x^{2} x' - 6 x y x' + 3 y^{2} x' + 3 {(x + y)}^{2} x'$

Step 2.4.5.17

Rewrite ${(x + y)}^{2}$ as $(x + y) (x + y)$ .

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 x^{2} x' - 6 x y x' + 3 y^{2} x' + 3 ((x + y) (x + y)) x'$

Step 2.4.5.18

Expand $(x + y) (x + y)$ using the FOIL Method.

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Step 2.4.5.18.1

Apply the distributive property.

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 x^{2} x' - 6 x y x' + 3 y^{2} x' + 3 (x (x + y) + y (x + y)) x'$

Step 2.4.5.18.2

Apply the distributive property.

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 x^{2} x' - 6 x y x' + 3 y^{2} x' + 3 (x \cdot x + x y + y (x + y)) x'$

Step 2.4.5.18.3

Apply the distributive property.

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 x^{2} x' - 6 x y x' + 3 y^{2} x' + 3 (x \cdot x + x y + y x + y \cdot y) x'$

Step 2.4.5.19

Simplify and combine like terms.

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Step 2.4.5.19.1

Simplify each term.

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Step 2.4.5.19.1.1

Multiply $x$ by $x$ .

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 x^{2} x' - 6 x y x' + 3 y^{2} x' + 3 (x^{2} + x y + y x + y \cdot y) x'$

Step 2.4.5.19.1.2

Multiply $y$ by $y$ .

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 x^{2} x' - 6 x y x' + 3 y^{2} x' + 3 (x^{2} + x y + y x + y^{2}) x'$

Step 2.4.5.19.2

Add $x y$ and $y x$ .

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Step 2.4.5.19.2.1

Reorder $y$ and $x$ .

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 x^{2} x' - 6 x y x' + 3 y^{2} x' + 3 (x^{2} + x y + x y + y^{2}) x'$

Step 2.4.5.19.2.2

Add $x y$ and $x y$ .

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 x^{2} x' - 6 x y x' + 3 y^{2} x' + 3 (x^{2} + 2 x y + y^{2}) x'$

Step 2.4.5.20

Apply the distributive property.

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 x^{2} x' - 6 x y x' + 3 y^{2} x' + (3 x^{2} + 3 (2 x y) + 3 y^{2}) x'$

Step 2.4.5.21

Multiply $2$ by $3$ .

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 x^{2} x' - 6 x y x' + 3 y^{2} x' + (3 x^{2} + 6 (x y) + 3 y^{2}) x'$

Step 2.4.5.22

Apply the distributive property.

$3 x^{2} + 6 x y + 3 y^{2} - 3 x^{2} + 6 x y - 3 y^{2} + 3 x^{2} x' - 6 x y x' + 3 y^{2} x' + 3 x^{2} x' + 6 x y x' + 3 y^{2} x'$

Step 2.4.6

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

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Step 2.4.6.1

Subtract $3 x^{2}$ from $3 x^{2}$ .

$6 x y + 3 y^{2} + 0 + 6 x y - 3 y^{2} + 3 x^{2} x' - 6 x y x' + 3 y^{2} x' + 3 x^{2} x' + 6 x y x' + 3 y^{2} x'$

Step 2.4.6.2

Add $6 x y + 3 y^{2}$ and $0$ .

$6 x y + 3 y^{2} + 6 x y - 3 y^{2} + 3 x^{2} x' - 6 x y x' + 3 y^{2} x' + 3 x^{2} x' + 6 x y x' + 3 y^{2} x'$

Step 2.4.6.3

Subtract $3 y^{2}$ from $3 y^{2}$ .

$6 x y + 6 x y + 0 + 3 x^{2} x' - 6 x y x' + 3 y^{2} x' + 3 x^{2} x' + 6 x y x' + 3 y^{2} x'$

Step 2.4.6.4

Add $6 x y + 6 x y$ and $0$ .

$6 x y + 6 x y + 3 x^{2} x' - 6 x y x' + 3 y^{2} x' + 3 x^{2} x' + 6 x y x' + 3 y^{2} x'$

Step 2.4.6.5

Add $- 6 x y x'$ and $6 x y x'$ .

$6 x y + 6 x y + 3 x^{2} x' + 3 y^{2} x' + 3 x^{2} x' + 0 + 3 y^{2} x'$

Step 2.4.6.6

Add $6 x y + 6 x y + 3 x^{2} x' + 3 y^{2} x' + 3 x^{2} x'$ and $0$ .

$6 x y + 6 x y + 3 x^{2} x' + 3 y^{2} x' + 3 x^{2} x' + 3 y^{2} x'$

Step 2.4.7

Add $6 x y$ and $6 x y$ .

$12 x y + 3 x^{2} x' + 3 y^{2} x' + 3 x^{2} x' + 3 y^{2} x'$

Step 2.4.8

Add $3 x^{2} x'$ and $3 x^{2} x'$ .

$12 x y + 6 x^{2} x' + 3 y^{2} x' + 3 y^{2} x'$

Step 2.4.9

Add $3 y^{2} x'$ and $3 y^{2} x'$ .

$12 x y + 6 x^{2} x' + 6 y^{2} x'$

Step 3

Differentiate the right side of the equation.

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Step 3.1

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

$\frac{d}{d y} [x^{5}] + \frac{d}{d y} [y^{5}]$

Step 3.2

Evaluate $\frac{d}{d y} [x^{5}]$ .

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Step 3.2.1

Differentiate using the chain rule, which states that $\frac{d}{d y} [f (g (y))]$ is $f' (g (y)) g' (y)$ where $f (y) = y^{5}$ and $g (y) = x$ .

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Step 3.2.1.1

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

$\frac{d}{d u} [u^{5}] \frac{d}{d y} [x] + \frac{d}{d y} [y^{5}]$

Step 3.2.1.2

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

$5 u^{4} \frac{d}{d y} [x] + \frac{d}{d y} [y^{5}]$

Step 3.2.1.3

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

$5 x^{4} \frac{d}{d y} [x] + \frac{d}{d y} [y^{5}]$

Step 3.2.2

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

$5 x^{4} x' + \frac{d}{d y} [y^{5}]$

Step 3.3

Differentiate using the Power Rule.

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Step 3.3.1

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

$5 x^{4} x' + 5 y^{4}$

Step 3.3.2

Reorder terms.

$5 y^{4} + 5 x^{4} x'$

Step 4

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

$12 x y + 6 x^{2} x' + 6 y^{2} x' = 5 y^{4} + 5 x^{4} x'$

Step 5

Solve for $x'$ .

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Step 5.1

Subtract $5 x^{4} x'$ from both sides of the equation.

$12 x y + 6 x^{2} x' + 6 y^{2} x' - 5 x^{4} x' = 5 y^{4}$

Step 5.2

Subtract $12 x y$ from both sides of the equation.

$6 x^{2} x' + 6 y^{2} x' - 5 x^{4} x' = 5 y^{4} - 12 x y$

Step 5.3

Factor $x'$ out of $6 x^{2} x' + 6 y^{2} x' - 5 x^{4} x'$ .

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Step 5.3.1

Factor $x'$ out of $6 x^{2} x'$ .

$x' (6 x^{2}) + 6 y^{2} x' - 5 x^{4} x' = 5 y^{4} - 12 x y$

Step 5.3.2

Factor $x'$ out of $6 y^{2} x'$ .

$x' (6 x^{2}) + x' (6 y^{2}) - 5 x^{4} x' = 5 y^{4} - 12 x y$

Step 5.3.3

Factor $x'$ out of $- 5 x^{4} x'$ .

$x' (6 x^{2}) + x' (6 y^{2}) + x' (- 5 x^{4}) = 5 y^{4} - 12 x y$

Step 5.3.4

Factor $x'$ out of $x' (6 x^{2}) + x' (6 y^{2})$ .

$x' (6 x^{2} + 6 y^{2}) + x' (- 5 x^{4}) = 5 y^{4} - 12 x y$

Step 5.3.5

Factor $x'$ out of $x' (6 x^{2} + 6 y^{2}) + x' (- 5 x^{4})$ .

$x' (6 x^{2} + 6 y^{2} - 5 x^{4}) = 5 y^{4} - 12 x y$

Step 5.4

Divide each term in $x' (6 x^{2} + 6 y^{2} - 5 x^{4}) = 5 y^{4} - 12 x y$ by $6 x^{2} + 6 y^{2} - 5 x^{4}$ and simplify.

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Step 5.4.1

Divide each term in $x' (6 x^{2} + 6 y^{2} - 5 x^{4}) = 5 y^{4} - 12 x y$ by $6 x^{2} + 6 y^{2} - 5 x^{4}$ .

$\frac{x' (6 x^{2} + 6 y^{2} - 5 x^{4})}{6 x^{2} + 6 y^{2} - 5 x^{4}} = \frac{5 y^{4}}{6 x^{2} + 6 y^{2} - 5 x^{4}} + \frac{- 12 x y}{6 x^{2} + 6 y^{2} - 5 x^{4}}$

Step 5.4.2

Simplify the left side.

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Step 5.4.2.1

Cancel the common factor of $6 x^{2} + 6 y^{2} - 5 x^{4}$ .

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Step 5.4.2.1.1

Cancel the common factor.

$\frac{x' (6 x^{2} + 6 y^{2} - 5 x^{4})}{6 x^{2} + 6 y^{2} - 5 x^{4}} = \frac{5 y^{4}}{6 x^{2} + 6 y^{2} - 5 x^{4}} + \frac{- 12 x y}{6 x^{2} + 6 y^{2} - 5 x^{4}}$

Step 5.4.2.1.2

Divide $x'$ by $1$ .

$x' = \frac{5 y^{4}}{6 x^{2} + 6 y^{2} - 5 x^{4}} + \frac{- 12 x y}{6 x^{2} + 6 y^{2} - 5 x^{4}}$

Step 5.4.3

Simplify the right side.

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Step 5.4.3.1

Combine the numerators over the common denominator.

$x' = \frac{5 y^{4} - 12 x y}{6 x^{2} + 6 y^{2} - 5 x^{4}}$

Step 5.4.3.2

Factor $y$ out of $5 y^{4} - 12 x y$ .

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Step 5.4.3.2.1

Factor $y$ out of $5 y^{4}$ .

$x' = \frac{y (5 y^{3}) - 12 x y}{6 x^{2} + 6 y^{2} - 5 x^{4}}$

Step 5.4.3.2.2

Factor $y$ out of $- 12 x y$ .

$x' = \frac{y (5 y^{3}) + y (- 12 x)}{6 x^{2} + 6 y^{2} - 5 x^{4}}$

Step 5.4.3.2.3

Factor $y$ out of $y (5 y^{3}) + y (- 12 x)$ .

$x' = \frac{y (5 y^{3} - 12 x)}{6 x^{2} + 6 y^{2} - 5 x^{4}}$

Step 6

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

$\frac{d x}{d y} = \frac{y (5 y^{3} - 12 x)}{6 x^{2} + 6 y^{2} - 5 x^{4}}$