Finite Math Examples

$(\frac{\sqrt{x} + 3 \sqrt{y}}{\sqrt{x} + \sqrt{y}} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1}) \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1

Simplify terms.

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Step 1.1

Remove parentheses.

$\frac{\sqrt{x} + 3 \sqrt{y}}{\sqrt{x} + \sqrt{y}} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2

Simplify each term.

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Step 1.2.1

Multiply $\frac{\sqrt{x} + 3 \sqrt{y}}{\sqrt{x} + \sqrt{y}}$ by $\frac{\sqrt{x} - \sqrt{y}}{\sqrt{x} - \sqrt{y}}$ .

$\frac{\sqrt{x} + 3 \sqrt{y}}{\sqrt{x} + \sqrt{y}} \cdot \frac{\sqrt{x} - \sqrt{y}}{\sqrt{x} - \sqrt{y}} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.2

Multiply $\frac{\sqrt{x} + 3 \sqrt{y}}{\sqrt{x} + \sqrt{y}}$ by $\frac{\sqrt{x} - \sqrt{y}}{\sqrt{x} - \sqrt{y}}$ .

$\frac{(\sqrt{x} + 3 \sqrt{y}) (\sqrt{x} - \sqrt{y})}{(\sqrt{x} + \sqrt{y}) (\sqrt{x} - \sqrt{y})} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.3

Expand the denominator using the FOIL method.

$\frac{(\sqrt{x} + 3 \sqrt{y}) (\sqrt{x} - \sqrt{y})}{{\sqrt{x}}^{2} - \sqrt{x y} + \sqrt{y x} - {\sqrt{y}}^{2}} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.4

Simplify.

$\frac{(\sqrt{x} + 3 \sqrt{y}) (\sqrt{x} - \sqrt{y})}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.5

Expand $(\sqrt{x} + 3 \sqrt{y}) (\sqrt{x} - \sqrt{y})$ using the FOIL Method.

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Step 1.2.5.1

Apply the distributive property.

$\frac{\sqrt{x} (\sqrt{x} - \sqrt{y}) + 3 \sqrt{y} (\sqrt{x} - \sqrt{y})}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.5.2

Apply the distributive property.

$\frac{\sqrt{x} \sqrt{x} + \sqrt{x} (- \sqrt{y}) + 3 \sqrt{y} (\sqrt{x} - \sqrt{y})}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.5.3

Apply the distributive property.

$\frac{\sqrt{x} \sqrt{x} + \sqrt{x} (- \sqrt{y}) + 3 \sqrt{y} \sqrt{x} + 3 \sqrt{y} (- \sqrt{y})}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.6

Simplify and combine like terms.

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Step 1.2.6.1

Simplify each term.

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Step 1.2.6.1.1

Multiply $\sqrt{x} \sqrt{x}$ .

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Step 1.2.6.1.1.1

Raise $\sqrt{x}$ to the power of $1$ .

Step 1.2.6.1.1.2

Raise $\sqrt{x}$ to the power of $1$ .

Step 1.2.6.1.1.3

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

$\frac{{\sqrt{x}}^{1 + 1} + \sqrt{x} (- \sqrt{y}) + 3 \sqrt{y} \sqrt{x} + 3 \sqrt{y} (- \sqrt{y})}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.6.1.1.4

Add $1$ and $1$ .

$\frac{{\sqrt{x}}^{2} + \sqrt{x} (- \sqrt{y}) + 3 \sqrt{y} \sqrt{x} + 3 \sqrt{y} (- \sqrt{y})}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.6.1.2

Rewrite ${\sqrt{x}}^{2}$ as $x$ .

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Step 1.2.6.1.2.1

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

$\frac{{(x^{\frac{1}{2}})}^{2} + \sqrt{x} (- \sqrt{y}) + 3 \sqrt{y} \sqrt{x} + 3 \sqrt{y} (- \sqrt{y})}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.6.1.2.2

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

$\frac{x^{\frac{1}{2} \cdot 2} + \sqrt{x} (- \sqrt{y}) + 3 \sqrt{y} \sqrt{x} + 3 \sqrt{y} (- \sqrt{y})}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.6.1.2.3

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

$\frac{x^{\frac{2}{2}} + \sqrt{x} (- \sqrt{y}) + 3 \sqrt{y} \sqrt{x} + 3 \sqrt{y} (- \sqrt{y})}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.6.1.2.4

Cancel the common factor of $2$ .

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Step 1.2.6.1.2.4.1

Cancel the common factor.

Step 1.2.6.1.2.4.2

Rewrite the expression.

$\frac{x + \sqrt{x} (- \sqrt{y}) + 3 \sqrt{y} \sqrt{x} + 3 \sqrt{y} (- \sqrt{y})}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.6.1.2.5

Simplify.

$\frac{x + \sqrt{x} (- \sqrt{y}) + 3 \sqrt{y} \sqrt{x} + 3 \sqrt{y} (- \sqrt{y})}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.6.1.3

Rewrite using the commutative property of multiplication.

$\frac{x - \sqrt{x} \sqrt{y} + 3 \sqrt{y} \sqrt{x} + 3 \sqrt{y} (- \sqrt{y})}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.6.1.4

Combine using the product rule for radicals.

$\frac{x - \sqrt{y x} + 3 \sqrt{y} \sqrt{x} + 3 \sqrt{y} (- \sqrt{y})}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.6.1.5

Combine using the product rule for radicals.

$\frac{x - \sqrt{y x} + 3 \sqrt{x y} + 3 \sqrt{y} (- \sqrt{y})}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.6.1.6

Multiply $3 \sqrt{y} (- \sqrt{y})$ .

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Step 1.2.6.1.6.1

Multiply $- 1$ by $3$ .

$\frac{x - \sqrt{y x} + 3 \sqrt{x y} - 3 \sqrt{y} \sqrt{y}}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.6.1.6.2

Raise $\sqrt{y}$ to the power of $1$ .

$\frac{x - \sqrt{y x} + 3 \sqrt{x y} - 3 (\sqrt{y} \sqrt{y})}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.6.1.6.3

Raise $\sqrt{y}$ to the power of $1$ .

$\frac{x - \sqrt{y x} + 3 \sqrt{x y} - 3 (\sqrt{y} \sqrt{y})}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.6.1.6.4

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

$\frac{x - \sqrt{y x} + 3 \sqrt{x y} - 3 {\sqrt{y}}^{1 + 1}}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.6.1.6.5

Add $1$ and $1$ .

$\frac{x - \sqrt{y x} + 3 \sqrt{x y} - 3 {\sqrt{y}}^{2}}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.6.1.7

Rewrite ${\sqrt{y}}^{2}$ as $y$ .

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Step 1.2.6.1.7.1

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

$\frac{x - \sqrt{y x} + 3 \sqrt{x y} - 3 {(y^{\frac{1}{2}})}^{2}}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.6.1.7.2

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

$\frac{x - \sqrt{y x} + 3 \sqrt{x y} - 3 y^{\frac{1}{2} \cdot 2}}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.6.1.7.3

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

$\frac{x - \sqrt{y x} + 3 \sqrt{x y} - 3 y^{\frac{2}{2}}}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.6.1.7.4

Cancel the common factor of $2$ .

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Step 1.2.6.1.7.4.1

Cancel the common factor.

$\frac{x - \sqrt{y x} + 3 \sqrt{x y} - 3 y^{\frac{2}{2}}}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.6.1.7.4.2

Rewrite the expression.

$\frac{x - \sqrt{y x} + 3 \sqrt{x y} - 3 y}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.6.1.7.5

Simplify.

$\frac{x - \sqrt{y x} + 3 \sqrt{x y} - 3 y}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.6.2

Add $- \sqrt{y x}$ and $3 \sqrt{x y}$ .

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Step 1.2.6.2.1

Reorder $y$ and $x$ .

$\frac{x - \sqrt{x y} + 3 \sqrt{x y} - 3 y}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.6.2.2

Add $- \sqrt{x y}$ and $3 \sqrt{x y}$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} - (\sqrt{x} - \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.7

Apply the distributive property.

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + (- \sqrt{x} + \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.8

Multiply $- - \sqrt{y}$ .

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Step 1.2.8.1

Multiply $- 1$ by $- 1$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + (- \sqrt{x} + 1 \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.8.2

Multiply $\sqrt{y}$ by $1$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + (- \sqrt{x} + \sqrt{y}) {(\sqrt{x} + \sqrt{y})}^{- 1} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.9

Rewrite the expression using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + (- \sqrt{x} + \sqrt{y}) (\frac{1}{\sqrt{x} + \sqrt{y}}) \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.10

Multiply $\frac{1}{\sqrt{x} + \sqrt{y}}$ by $\frac{\sqrt{x} - \sqrt{y}}{\sqrt{x} - \sqrt{y}}$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + (- \sqrt{x} + \sqrt{y}) (\frac{1}{\sqrt{x} + \sqrt{y}} \cdot \frac{\sqrt{x} - \sqrt{y}}{\sqrt{x} - \sqrt{y}}) \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.11

Multiply $\frac{1}{\sqrt{x} + \sqrt{y}}$ by $\frac{\sqrt{x} - \sqrt{y}}{\sqrt{x} - \sqrt{y}}$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + (- \sqrt{x} + \sqrt{y}) (\frac{\sqrt{x} - \sqrt{y}}{(\sqrt{x} + \sqrt{y}) (\sqrt{x} - \sqrt{y})}) \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.12

Expand the denominator using the FOIL method.

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + (- \sqrt{x} + \sqrt{y}) (\frac{\sqrt{x} - \sqrt{y}}{{\sqrt{x}}^{2} - \sqrt{x y} + \sqrt{y x} - {\sqrt{y}}^{2}}) \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.13

Simplify.

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + (- \sqrt{x} + \sqrt{y}) (\frac{\sqrt{x} - \sqrt{y}}{x - y}) \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.14

Multiply $- \sqrt{x} + \sqrt{y}$ by $\frac{\sqrt{x} - \sqrt{y}}{x - y}$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{(- \sqrt{x} + \sqrt{y}) (\sqrt{x} - \sqrt{y})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.15

Simplify the numerator.

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Step 1.2.15.1

Factor $- 1$ out of $- \sqrt{x}$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{(- (\sqrt{x}) + \sqrt{y}) (\sqrt{x} - \sqrt{y})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.15.2

Factor $- 1$ out of $\sqrt{y}$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{(- (\sqrt{x}) - 1 (- \sqrt{y})) (\sqrt{x} - \sqrt{y})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.15.3

Factor $- 1$ out of $- (\sqrt{x}) - 1 (- \sqrt{y})$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- (\sqrt{x} - \sqrt{y}) (\sqrt{x} - \sqrt{y})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.15.4

Rewrite $- (\sqrt{x} - \sqrt{y})$ as $- 1 (\sqrt{x} - \sqrt{y})$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (\sqrt{x} - \sqrt{y}) (\sqrt{x} - \sqrt{y})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.15.5

Raise $\sqrt{x} - \sqrt{y}$ to the power of $1$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 ((\sqrt{x} - \sqrt{y}) (\sqrt{x} - \sqrt{y}))}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.15.6

Raise $\sqrt{x} - \sqrt{y}$ to the power of $1$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 ((\sqrt{x} - \sqrt{y}) (\sqrt{x} - \sqrt{y}))}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.15.7

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

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 {(\sqrt{x} - \sqrt{y})}^{1 + 1}}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.15.8

Add $1$ and $1$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 {(\sqrt{x} - \sqrt{y})}^{2}}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.16

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

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 ((\sqrt{x} - \sqrt{y}) (\sqrt{x} - \sqrt{y}))}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.17

Expand $(\sqrt{x} - \sqrt{y}) (\sqrt{x} - \sqrt{y})$ using the FOIL Method.

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Step 1.2.17.1

Apply the distributive property.

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (\sqrt{x} (\sqrt{x} - \sqrt{y}) - \sqrt{y} (\sqrt{x} - \sqrt{y}))}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.17.2

Apply the distributive property.

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (\sqrt{x} \sqrt{x} + \sqrt{x} (- \sqrt{y}) - \sqrt{y} (\sqrt{x} - \sqrt{y}))}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.17.3

Apply the distributive property.

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (\sqrt{x} \sqrt{x} + \sqrt{x} (- \sqrt{y}) - \sqrt{y} \sqrt{x} - \sqrt{y} (- \sqrt{y}))}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18

Simplify and combine like terms.

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Step 1.2.18.1

Simplify each term.

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Step 1.2.18.1.1

Multiply $\sqrt{x} \sqrt{x}$ .

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Step 1.2.18.1.1.1

Raise $\sqrt{x}$ to the power of $1$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (\sqrt{x} \sqrt{x} + \sqrt{x} (- \sqrt{y}) - \sqrt{y} \sqrt{x} - \sqrt{y} (- \sqrt{y}))}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.1.2

Raise $\sqrt{x}$ to the power of $1$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (\sqrt{x} \sqrt{x} + \sqrt{x} (- \sqrt{y}) - \sqrt{y} \sqrt{x} - \sqrt{y} (- \sqrt{y}))}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.1.3

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

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 ({\sqrt{x}}^{1 + 1} + \sqrt{x} (- \sqrt{y}) - \sqrt{y} \sqrt{x} - \sqrt{y} (- \sqrt{y}))}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.1.4

Add $1$ and $1$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 ({\sqrt{x}}^{2} + \sqrt{x} (- \sqrt{y}) - \sqrt{y} \sqrt{x} - \sqrt{y} (- \sqrt{y}))}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.2

Rewrite ${\sqrt{x}}^{2}$ as $x$ .

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Step 1.2.18.1.2.1

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

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 ({(x^{\frac{1}{2}})}^{2} + \sqrt{x} (- \sqrt{y}) - \sqrt{y} \sqrt{x} - \sqrt{y} (- \sqrt{y}))}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.2.2

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

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (x^{\frac{1}{2} \cdot 2} + \sqrt{x} (- \sqrt{y}) - \sqrt{y} \sqrt{x} - \sqrt{y} (- \sqrt{y}))}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.2.3

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

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (x^{\frac{2}{2}} + \sqrt{x} (- \sqrt{y}) - \sqrt{y} \sqrt{x} - \sqrt{y} (- \sqrt{y}))}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.2.4

Cancel the common factor of $2$ .

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Step 1.2.18.1.2.4.1

Cancel the common factor.

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (x^{\frac{2}{2}} + \sqrt{x} (- \sqrt{y}) - \sqrt{y} \sqrt{x} - \sqrt{y} (- \sqrt{y}))}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.2.4.2

Rewrite the expression.

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (x + \sqrt{x} (- \sqrt{y}) - \sqrt{y} \sqrt{x} - \sqrt{y} (- \sqrt{y}))}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.2.5

Simplify.

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (x + \sqrt{x} (- \sqrt{y}) - \sqrt{y} \sqrt{x} - \sqrt{y} (- \sqrt{y}))}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.3

Rewrite using the commutative property of multiplication.

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (x - \sqrt{x} \sqrt{y} - \sqrt{y} \sqrt{x} - \sqrt{y} (- \sqrt{y}))}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.4

Combine using the product rule for radicals.

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (x - \sqrt{y x} - \sqrt{y} \sqrt{x} - \sqrt{y} (- \sqrt{y}))}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.5

Combine using the product rule for radicals.

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (x - \sqrt{y x} - \sqrt{x y} - \sqrt{y} (- \sqrt{y}))}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.6

Multiply $- \sqrt{y} (- \sqrt{y})$ .

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Step 1.2.18.1.6.1

Multiply $- 1$ by $- 1$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (x - \sqrt{y x} - \sqrt{x y} + 1 \sqrt{y} \sqrt{y})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.6.2

Multiply $\sqrt{y}$ by $1$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (x - \sqrt{y x} - \sqrt{x y} + \sqrt{y} \sqrt{y})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.6.3

Raise $\sqrt{y}$ to the power of $1$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (x - \sqrt{y x} - \sqrt{x y} + \sqrt{y} \sqrt{y})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.6.4

Raise $\sqrt{y}$ to the power of $1$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (x - \sqrt{y x} - \sqrt{x y} + \sqrt{y} \sqrt{y})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.6.5

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

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (x - \sqrt{y x} - \sqrt{x y} + {\sqrt{y}}^{1 + 1})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.6.6

Add $1$ and $1$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (x - \sqrt{y x} - \sqrt{x y} + {\sqrt{y}}^{2})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.7

Rewrite ${\sqrt{y}}^{2}$ as $y$ .

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Step 1.2.18.1.7.1

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

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (x - \sqrt{y x} - \sqrt{x y} + {(y^{\frac{1}{2}})}^{2})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.7.2

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

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (x - \sqrt{y x} - \sqrt{x y} + y^{\frac{1}{2} \cdot 2})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.7.3

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

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (x - \sqrt{y x} - \sqrt{x y} + y^{\frac{2}{2}})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.7.4

Cancel the common factor of $2$ .

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Step 1.2.18.1.7.4.1

Cancel the common factor.

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (x - \sqrt{y x} - \sqrt{x y} + y^{\frac{2}{2}})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.7.4.2

Rewrite the expression.

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (x - \sqrt{y x} - \sqrt{x y} + y)}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.1.7.5

Simplify.

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (x - \sqrt{y x} - \sqrt{x y} + y)}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.2

Subtract $\sqrt{x y}$ from $- \sqrt{y x}$ .

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Step 1.2.18.2.1

Reorder $y$ and $x$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (x - \sqrt{x y} - \sqrt{x y} + y)}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.18.2.2

Subtract $\sqrt{x y}$ from $- \sqrt{x y}$ .

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} + \frac{- 1 (x - 2 \sqrt{x y} + y)}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.2.19

Move the negative in front of the fraction.

$\frac{x + 2 \sqrt{x y} - 3 y}{x - y} - \frac{x - 2 \sqrt{x y} + y}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.3

Combine the numerators over the common denominator.

$\frac{x + 2 \sqrt{x y} - 3 y - (x - 2 \sqrt{x y} + y)}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.4

Simplify each term.

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Step 1.4.1

Apply the distributive property.

$\frac{x + 2 \sqrt{x y} - 3 y - x - (- 2 \sqrt{x y}) - y}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.4.2

Multiply $- 2$ by $- 1$ .

$\frac{x + 2 \sqrt{x y} - 3 y - x + 2 \sqrt{x y} - y}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.5

Simplify by adding terms.

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Step 1.5.1

Combine the opposite terms in $x + 2 \sqrt{x y} - 3 y - x + 2 \sqrt{x y} - y$ .

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Step 1.5.1.1

Subtract $x$ from $x$ .

$\frac{0 + 2 \sqrt{x y} - 3 y + 2 \sqrt{x y} - y}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.5.1.2

Add $0$ and $2 \sqrt{x y}$ .

$\frac{2 \sqrt{x y} - 3 y + 2 \sqrt{x y} - y}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.5.2

Add $2 \sqrt{x y}$ and $2 \sqrt{x y}$ .

$\frac{- 3 y + 4 \sqrt{x y} - y}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 1.5.3

Subtract $y$ from $- 3 y$ .

$\frac{- 4 y + 4 \sqrt{x y}}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 2

Simplify the numerator.

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Step 2.1

Factor $4$ out of $- 4 y + 4 \sqrt{x y}$ .

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Step 2.1.1

Factor $4$ out of $- 4 y$ .

$\frac{4 (- y) + 4 \sqrt{x y}}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 2.1.2

Factor $4$ out of $4 \sqrt{x y}$ .

$\frac{4 (- y) + 4 (\sqrt{x y})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 2.1.3

Factor $4$ out of $4 (- y) + 4 (\sqrt{x y})$ .

$\frac{4 (- y + \sqrt{x y})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 2.2

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

$\frac{4 (- y + {(x y)}^{\frac{1}{2}})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 2.3

Apply the product rule to $x y$ .

$\frac{4 (- y + x^{\frac{1}{2}} y^{\frac{1}{2}})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 2.4

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

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Step 2.4.1

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

$\frac{4 (y^{\frac{1}{2}} (- y^{\frac{1}{2}}) + x^{\frac{1}{2}} y^{\frac{1}{2}})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 2.4.2

Factor $y^{\frac{1}{2}}$ out of $x^{\frac{1}{2}} y^{\frac{1}{2}}$ .

$\frac{4 (y^{\frac{1}{2}} (- y^{\frac{1}{2}}) + y^{\frac{1}{2}} x^{\frac{1}{2}})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 2.4.3

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

$\frac{4 (y^{\frac{1}{2}} (- y^{\frac{1}{2}} + x^{\frac{1}{2}}))}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

$\frac{4 y^{\frac{1}{2}} (- y^{\frac{1}{2}} + x^{\frac{1}{2}})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 3

Simplify with factoring out.

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Step 3.1

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

$\frac{4 y^{\frac{1}{2}} (- (y^{\frac{1}{2}}) + x^{\frac{1}{2}})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 3.2

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

$\frac{4 y^{\frac{1}{2}} (- (y^{\frac{1}{2}}) - 1 (- x^{\frac{1}{2}}))}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 3.3

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

$\frac{4 y^{\frac{1}{2}} (- (y^{\frac{1}{2}} - x^{\frac{1}{2}}))}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 3.4

Simplify the expression.

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Step 3.4.1

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

$\frac{4 y^{\frac{1}{2}} (- 1 (y^{\frac{1}{2}} - x^{\frac{1}{2}}))}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 3.4.2

Move the negative in front of the fraction.

$- \frac{(4 y^{\frac{1}{2}}) (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 4

Multiply $4 y^{\frac{1}{2}}$ by $y^{\frac{1}{2}} - x^{\frac{1}{2}}$ .

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 {(\sqrt{y})}^{3}}$

Step 5

Simplify the denominator.

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Step 5.1

Rewrite ${\sqrt{y}}^{3}$ as $\sqrt{y^{3}}$ .

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 \sqrt{y^{3}}}$

Step 5.2

Factor out $y^{2}$ .

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 \sqrt{y^{2} y}}$

Step 5.3

Pull terms out from under the radical.

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 y \sqrt{y}}$

Step 6

Multiply $\frac{\sqrt{x} + \sqrt{y}}{8 y \sqrt{y}}$ by $\frac{\sqrt{y}}{\sqrt{y}}$ .

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{\sqrt{x} + \sqrt{y}}{8 y \sqrt{y}} \cdot \frac{\sqrt{y}}{\sqrt{y}}$

Step 7

Combine and simplify the denominator.

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Step 7.1

Multiply $\frac{\sqrt{x} + \sqrt{y}}{8 y \sqrt{y}}$ by $\frac{\sqrt{y}}{\sqrt{y}}$ .

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{(\sqrt{x} + \sqrt{y}) \sqrt{y}}{8 y \sqrt{y} \sqrt{y}}$

Step 7.2

Move $\sqrt{y}$ .

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{(\sqrt{x} + \sqrt{y}) \sqrt{y}}{8 y (\sqrt{y} \sqrt{y})}$

Step 7.3

Raise $\sqrt{y}$ to the power of $1$ .

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{(\sqrt{x} + \sqrt{y}) \sqrt{y}}{8 y (\sqrt{y} \sqrt{y})}$

Step 7.4

Raise $\sqrt{y}$ to the power of $1$ .

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{(\sqrt{x} + \sqrt{y}) \sqrt{y}}{8 y (\sqrt{y} \sqrt{y})}$

Step 7.5

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

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{(\sqrt{x} + \sqrt{y}) \sqrt{y}}{8 y {\sqrt{y}}^{1 + 1}}$

Step 7.6

Add $1$ and $1$ .

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{(\sqrt{x} + \sqrt{y}) \sqrt{y}}{8 y {\sqrt{y}}^{2}}$

Step 7.7

Rewrite ${\sqrt{y}}^{2}$ as $y$ .

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Step 7.7.1

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

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{(\sqrt{x} + \sqrt{y}) \sqrt{y}}{8 y {(y^{\frac{1}{2}})}^{2}}$

Step 7.7.2

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

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{(\sqrt{x} + \sqrt{y}) \sqrt{y}}{8 y \cdot y^{\frac{1}{2} \cdot 2}}$

Step 7.7.3

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

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{(\sqrt{x} + \sqrt{y}) \sqrt{y}}{8 y \cdot y^{\frac{2}{2}}}$

Step 7.7.4

Cancel the common factor of $2$ .

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Step 7.7.4.1

Cancel the common factor.

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{(\sqrt{x} + \sqrt{y}) \sqrt{y}}{8 y \cdot y^{\frac{2}{2}}}$

Step 7.7.4.2

Rewrite the expression.

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{(\sqrt{x} + \sqrt{y}) \sqrt{y}}{8 y \cdot y}$

Step 7.7.5

Simplify.

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{(\sqrt{x} + \sqrt{y}) \sqrt{y}}{8 y \cdot y}$

Step 8

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

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Step 8.1

Move $y$ .

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{(\sqrt{x} + \sqrt{y}) \sqrt{y}}{8 (y \cdot y)}$

Step 8.2

Multiply $y$ by $y$ .

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{(\sqrt{x} + \sqrt{y}) \sqrt{y}}{8 y^{2}}$

Step 9

Apply the distributive property.

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{\sqrt{x} \sqrt{y} + \sqrt{y} \sqrt{y}}{8 y^{2}}$

Step 10

Combine using the product rule for radicals.

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{\sqrt{x y} + \sqrt{y} \sqrt{y}}{8 y^{2}}$

Step 11

Multiply $\sqrt{y} \sqrt{y}$ .

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Step 11.1

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

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{\sqrt{x y} + {\sqrt{y}}^{1 + 1}}{8 y^{2}}$

Step 11.2

Add $1$ and $1$ .

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{\sqrt{x y} + {\sqrt{y}}^{2}}{8 y^{2}}$

Step 12

Rewrite ${\sqrt{y}}^{2}$ as $y$ .

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Step 12.1

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

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{\sqrt{x y} + {(y^{\frac{1}{2}})}^{2}}{8 y^{2}}$

Step 12.2

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

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{\sqrt{x y} + y^{\frac{1}{2} \cdot 2}}{8 y^{2}}$

Step 12.3

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

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{\sqrt{x y} + y^{\frac{2}{2}}}{8 y^{2}}$

Step 12.4

Cancel the common factor of $2$ .

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Step 12.4.1

Cancel the common factor.

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{\sqrt{x y} + y^{\frac{2}{2}}}{8 y^{2}}$

Step 12.4.2

Rewrite the expression.

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{\sqrt{x y} + y}{8 y^{2}}$

Step 12.5

Simplify.

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{\sqrt{x y} + y}{8 y^{2}}$

Step 13

Simplify the numerator.

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Step 13.1

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

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{{(x y)}^{\frac{1}{2}} + y}{8 y^{2}}$

Step 13.2

Apply the product rule to $x y$ .

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{x^{\frac{1}{2}} y^{\frac{1}{2}} + y}{8 y^{2}}$

Step 13.3

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

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Step 13.3.1

Factor $y^{\frac{1}{2}}$ out of $x^{\frac{1}{2}} y^{\frac{1}{2}}$ .

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{y^{\frac{1}{2}} x^{\frac{1}{2}} + y}{8 y^{2}}$

Step 13.3.2

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

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{y^{\frac{1}{2}} x^{\frac{1}{2}} + y}{8 y^{2}}$

Step 13.3.3

Factor $y^{\frac{1}{2}}$ out of $y^{1}$ .

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{y^{\frac{1}{2}} x^{\frac{1}{2}} + y^{\frac{1}{2}} y^{\frac{1}{2}}}{8 y^{2}}$

Step 13.3.4

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

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{y^{\frac{1}{2}} (x^{\frac{1}{2}} + y^{\frac{1}{2}})}{8 y^{2}}$

Step 14

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

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{x^{\frac{1}{2}} + y^{\frac{1}{2}}}{8 y^{2} y^{- \frac{1}{2}}}$

Step 15

Multiply $y^{2}$ by $y^{- \frac{1}{2}}$ by adding the exponents.

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Step 15.1

Move $y^{- \frac{1}{2}}$ .

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{x^{\frac{1}{2}} + y^{\frac{1}{2}}}{8 (y^{- \frac{1}{2}} y^{2})}$

Step 15.2

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

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{x^{\frac{1}{2}} + y^{\frac{1}{2}}}{8 y^{- \frac{1}{2} + 2}}$

Step 15.3

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

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{x^{\frac{1}{2}} + y^{\frac{1}{2}}}{8 y^{- \frac{1}{2} + 2 \cdot \frac{2}{2}}}$

Step 15.4

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

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{x^{\frac{1}{2}} + y^{\frac{1}{2}}}{8 y^{- \frac{1}{2} + \frac{2 \cdot 2}{2}}}$

Step 15.5

Combine the numerators over the common denominator.

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{x^{\frac{1}{2}} + y^{\frac{1}{2}}}{8 y^{\frac{- 1 + 2 \cdot 2}{2}}}$

Step 15.6

Simplify the numerator.

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Step 15.6.1

Multiply $2$ by $2$ .

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{x^{\frac{1}{2}} + y^{\frac{1}{2}}}{8 y^{\frac{- 1 + 4}{2}}}$

Step 15.6.2

Add $- 1$ and $4$ .

$- \frac{4 y^{\frac{1}{2}} (y^{\frac{1}{2}} - x^{\frac{1}{2}})}{x - y} \cdot \frac{x^{\frac{1}{2}} + y^{\frac{1}{2}}}{8 y^{\frac{3}{2}}}$

Step 16

Finding the LCD of a list of values is the same as finding the LCM of the denominators of those values.

$x - y, 8 y^{\frac{3}{2}}$

Step 17

Since $x - y, 8 y^{\frac{3}{2}}$ contains both numbers and variables, there are four steps to find the LCM. Find LCM for the numeric, variable, and compound variable parts. Then, multiply them all together.

Steps to find the LCM for $x - y, 8 y^{\frac{3}{2}}$ are:

1. Find the LCM for the numeric part $1, 8$ .

2. Find the LCM for the variable part $y^{\frac{3}{2}}$ .

3. Find the LCM for the compound variable part $x - y$ .

4. Multiply each LCM together.

Step 18

The LCM is the smallest positive number that all of the numbers divide into evenly.

1. List the prime factors of each number.

2. Multiply each factor the greatest number of times it occurs in either number.

Step 19

The number $1$ is not a prime number because it only has one positive factor, which is itself.

Not prime

Step 20

The prime factors for $8$ are $2 \cdot 2 \cdot 2$ .

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Step 20.1

$8$ has factors of $2$ and $4$ .

$2 \cdot 4$

Step 20.2

$4$ has factors of $2$ and $2$ .

$2 \cdot 2 \cdot 2$

Step 21

Multiply $2 \cdot 2 \cdot 2$ .

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Step 21.1

Multiply $2$ by $2$ .

$4 \cdot 2$

Step 21.2

Multiply $4$ by $2$ .

$8$

Step 22

The LCM of $y^{\frac{3}{2}}$ is the result of multiplying all prime factors the greatest number of times they occur in either term.

$y^{\frac{3}{2}}$

Step 23

The factor for $x - y$ is $x - y$ itself.

$(x - y) = x - y$

$(x - y)$ occurs $1$ time.

Step 24

The LCM of $x - y$ is the result of multiplying all factors the greatest number of times they occur in either term.

$x - y$

Step 25

The Least Common Multiple $LCM$ of some numbers is the smallest number that the numbers are factors of.

$8 y^{\frac{3}{2}} (x - y)$