Finite Math Examples

$\frac{\sqrt{\frac{y + 2}{y - 2}} + \sqrt{\frac{y - 2}{y + 2}}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1

Simplify the numerator.

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Step 1.1

Rewrite $\sqrt{\frac{y + 2}{y - 2}}$ as $\frac{\sqrt{y + 2}}{\sqrt{y - 2}}$ .

$\frac{\frac{\sqrt{y + 2}}{\sqrt{y - 2}} + \sqrt{\frac{y - 2}{y + 2}}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.2

Multiply $\frac{\sqrt{y + 2}}{\sqrt{y - 2}}$ by $\frac{\sqrt{y - 2}}{\sqrt{y - 2}}$ .

$\frac{\frac{\sqrt{y + 2}}{\sqrt{y - 2}} \cdot \frac{\sqrt{y - 2}}{\sqrt{y - 2}} + \sqrt{\frac{y - 2}{y + 2}}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.3

Combine and simplify the denominator.

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Step 1.3.1

Multiply $\frac{\sqrt{y + 2}}{\sqrt{y - 2}}$ by $\frac{\sqrt{y - 2}}{\sqrt{y - 2}}$ .

$\frac{\frac{\sqrt{y + 2} \sqrt{y - 2}}{\sqrt{y - 2} \sqrt{y - 2}} + \sqrt{\frac{y - 2}{y + 2}}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.3.2

Raise $\sqrt{y - 2}$ to the power of $1$ .

$\frac{\frac{\sqrt{y + 2} \sqrt{y - 2}}{{\sqrt{y - 2}}^{1} \sqrt{y - 2}} + \sqrt{\frac{y - 2}{y + 2}}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.3.3

Raise $\sqrt{y - 2}$ to the power of $1$ .

$\frac{\frac{\sqrt{y + 2} \sqrt{y - 2}}{{\sqrt{y - 2}}^{1} {\sqrt{y - 2}}^{1}} + \sqrt{\frac{y - 2}{y + 2}}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.3.4

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

$\frac{\frac{\sqrt{y + 2} \sqrt{y - 2}}{{\sqrt{y - 2}}^{1 + 1}} + \sqrt{\frac{y - 2}{y + 2}}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.3.5

Add $1$ and $1$ .

$\frac{\frac{\sqrt{y + 2} \sqrt{y - 2}}{{\sqrt{y - 2}}^{2}} + \sqrt{\frac{y - 2}{y + 2}}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.3.6

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

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Step 1.3.6.1

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

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

Step 1.3.6.2

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

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

Step 1.3.6.3

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

$\frac{\frac{\sqrt{y + 2} \sqrt{y - 2}}{{(y - 2)}^{\frac{2}{2}}} + \sqrt{\frac{y - 2}{y + 2}}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.3.6.4

Cancel the common factor of $2$ .

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Step 1.3.6.4.1

Cancel the common factor.

$\frac{\frac{\sqrt{y + 2} \sqrt{y - 2}}{{(y - 2)}^{\frac{2}{2}}} + \sqrt{\frac{y - 2}{y + 2}}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.3.6.4.2

Rewrite the expression.

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

Step 1.3.6.5

Simplify.

$\frac{\frac{\sqrt{y + 2} \sqrt{y - 2}}{y - 2} + \sqrt{\frac{y - 2}{y + 2}}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.4

Combine using the product rule for radicals.

$\frac{\frac{\sqrt{(y + 2) (y - 2)}}{y - 2} + \sqrt{\frac{y - 2}{y + 2}}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.5

Rewrite $\sqrt{\frac{y - 2}{y + 2}}$ as $\frac{\sqrt{y - 2}}{\sqrt{y + 2}}$ .

$\frac{\frac{\sqrt{(y + 2) (y - 2)}}{y - 2} + \frac{\sqrt{y - 2}}{\sqrt{y + 2}}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.6

Multiply $\frac{\sqrt{y - 2}}{\sqrt{y + 2}}$ by $\frac{\sqrt{y + 2}}{\sqrt{y + 2}}$ .

$\frac{\frac{\sqrt{(y + 2) (y - 2)}}{y - 2} + \frac{\sqrt{y - 2}}{\sqrt{y + 2}} \cdot \frac{\sqrt{y + 2}}{\sqrt{y + 2}}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.7

Combine and simplify the denominator.

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Step 1.7.1

Multiply $\frac{\sqrt{y - 2}}{\sqrt{y + 2}}$ by $\frac{\sqrt{y + 2}}{\sqrt{y + 2}}$ .

$\frac{\frac{\sqrt{(y + 2) (y - 2)}}{y - 2} + \frac{\sqrt{y - 2} \sqrt{y + 2}}{\sqrt{y + 2} \sqrt{y + 2}}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.7.2

Raise $\sqrt{y + 2}$ to the power of $1$ .

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

Step 1.7.3

Raise $\sqrt{y + 2}$ to the power of $1$ .

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

Step 1.7.4

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

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

Step 1.7.5

Add $1$ and $1$ .

$\frac{\frac{\sqrt{(y + 2) (y - 2)}}{y - 2} + \frac{\sqrt{y - 2} \sqrt{y + 2}}{{\sqrt{y + 2}}^{2}}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.7.6

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

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Step 1.7.6.1

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

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

Step 1.7.6.2

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

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

Step 1.7.6.3

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

$\frac{\frac{\sqrt{(y + 2) (y - 2)}}{y - 2} + \frac{\sqrt{y - 2} \sqrt{y + 2}}{{(y + 2)}^{\frac{2}{2}}}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.7.6.4

Cancel the common factor of $2$ .

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Step 1.7.6.4.1

Cancel the common factor.

$\frac{\frac{\sqrt{(y + 2) (y - 2)}}{y - 2} + \frac{\sqrt{y - 2} \sqrt{y + 2}}{{(y + 2)}^{\frac{2}{2}}}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.7.6.4.2

Rewrite the expression.

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

Step 1.7.6.5

Simplify.

$\frac{\frac{\sqrt{(y + 2) (y - 2)}}{y - 2} + \frac{\sqrt{y - 2} \sqrt{y + 2}}{y + 2}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.8

Combine using the product rule for radicals.

$\frac{\frac{\sqrt{(y + 2) (y - 2)}}{y - 2} + \frac{\sqrt{(y - 2) (y + 2)}}{y + 2}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.9

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

$\frac{\frac{\sqrt{(y + 2) (y - 2)}}{y - 2} \cdot \frac{y + 2}{y + 2} + \frac{\sqrt{(y - 2) (y + 2)}}{y + 2}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.10

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

$\frac{\frac{\sqrt{(y + 2) (y - 2)}}{y - 2} \cdot \frac{y + 2}{y + 2} + \frac{\sqrt{(y - 2) (y + 2)}}{y + 2} \cdot \frac{y - 2}{y - 2}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.11

Write each expression with a common denominator of $(y - 2) (y + 2)$ , by multiplying each by an appropriate factor of $1$ .

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Step 1.11.1

Multiply $\frac{\sqrt{(y + 2) (y - 2)}}{y - 2}$ by $\frac{y + 2}{y + 2}$ .

$\frac{\frac{\sqrt{(y + 2) (y - 2)} (y + 2)}{(y - 2) (y + 2)} + \frac{\sqrt{(y - 2) (y + 2)}}{y + 2} \cdot \frac{y - 2}{y - 2}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.11.2

Multiply $\frac{\sqrt{(y - 2) (y + 2)}}{y + 2}$ by $\frac{y - 2}{y - 2}$ .

$\frac{\frac{\sqrt{(y + 2) (y - 2)} (y + 2)}{(y - 2) (y + 2)} + \frac{\sqrt{(y - 2) (y + 2)} (y - 2)}{(y + 2) (y - 2)}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.11.3

Reorder the factors of $(y - 2) (y + 2)$ .

$\frac{\frac{\sqrt{(y + 2) (y - 2)} (y + 2)}{(y + 2) (y - 2)} + \frac{\sqrt{(y - 2) (y + 2)} (y - 2)}{(y + 2) (y - 2)}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.12

Combine the numerators over the common denominator.

$\frac{\frac{\sqrt{(y + 2) (y - 2)} (y + 2) + \sqrt{(y - 2) (y + 2)} (y - 2)}{(y + 2) (y - 2)}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.13

Rewrite $\frac{\sqrt{(y + 2) (y - 2)} (y + 2) + \sqrt{(y - 2) (y + 2)} (y - 2)}{(y + 2) (y - 2)}$ in a factored form.

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Step 1.13.1

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

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

Step 1.13.2

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

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

Step 1.13.3

Expand $(y + 2) (y - 2)$ using the FOIL Method.

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Step 1.13.3.1

Apply the distributive property.

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

Step 1.13.3.2

Apply the distributive property.

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

Step 1.13.3.3

Apply the distributive property.

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

Step 1.13.4

Combine the opposite terms in $y \cdot y + y \cdot - 2 + 2 y + 2 \cdot - 2$ .

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Step 1.13.4.1

Reorder the factors in the terms $y \cdot - 2$ and $2 y$ .

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

Step 1.13.4.2

Add $- 2 y$ and $2 y$ .

$\frac{\frac{{(y \cdot y + 0 + 2 \cdot - 2)}^{\frac{1}{2}} (y + 2) + {((y - 2) (y + 2))}^{\frac{1}{2}} (y - 2)}{(y + 2) (y - 2)}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.13.4.3

Add $y \cdot y$ and $0$ .

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

Step 1.13.5

Simplify each term.

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Step 1.13.5.1

Multiply $y$ by $y$ .

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

Step 1.13.5.2

Multiply $2$ by $- 2$ .

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

Step 1.13.6

Apply the distributive property.

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

Step 1.13.7

Move $2$ to the left of ${(y^{2} - 4)}^{\frac{1}{2}}$ .

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

Step 1.13.8

Expand $(y - 2) (y + 2)$ using the FOIL Method.

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Step 1.13.8.1

Apply the distributive property.

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

Step 1.13.8.2

Apply the distributive property.

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

Step 1.13.8.3

Apply the distributive property.

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

Step 1.13.9

Combine the opposite terms in $y \cdot y + y \cdot 2 - 2 y - 2 \cdot 2$ .

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Step 1.13.9.1

Reorder the factors in the terms $y \cdot 2$ and $- 2 y$ .

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

Step 1.13.9.2

Subtract $2 y$ from $2 y$ .

$\frac{\frac{{(y^{2} - 4)}^{\frac{1}{2}} y + 2 {(y^{2} - 4)}^{\frac{1}{2}} + {(y \cdot y + 0 - 2 \cdot 2)}^{\frac{1}{2}} (y - 2)}{(y + 2) (y - 2)}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.13.9.3

Add $y \cdot y$ and $0$ .

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

Step 1.13.10

Simplify each term.

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Step 1.13.10.1

Multiply $y$ by $y$ .

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

Step 1.13.10.2

Multiply $- 2$ by $2$ .

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

Step 1.13.11

Apply the distributive property.

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

Step 1.13.12

Move $- 2$ to the left of ${(y^{2} - 4)}^{\frac{1}{2}}$ .

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

Step 1.13.13

Add ${(y^{2} - 4)}^{\frac{1}{2}} y$ and ${(y^{2} - 4)}^{\frac{1}{2}} y$ .

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

Step 1.13.14

Subtract $2 {(y^{2} - 4)}^{\frac{1}{2}}$ from $2 {(y^{2} - 4)}^{\frac{1}{2}}$ .

$\frac{\frac{2 {(y^{2} - 4)}^{\frac{1}{2}} y + 0}{(y + 2) (y - 2)}}{\sqrt{\frac{y + 2}{y - 2}} - \sqrt{\frac{y - 2}{y + 2}}}$

Step 1.13.15

Add $2 {(y^{2} - 4)}^{\frac{1}{2}} y$ and $0$ .

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

Step 1.13.16

Reorder the factors of $2 {(y^{2} - 4)}^{\frac{1}{2}} y$ .

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

Step 2

Simplify the denominator.

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Step 2.1

Rewrite $\sqrt{\frac{y + 2}{y - 2}}$ as $\frac{\sqrt{y + 2}}{\sqrt{y - 2}}$ .

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

Step 2.2

Multiply $\frac{\sqrt{y + 2}}{\sqrt{y - 2}}$ by $\frac{\sqrt{y - 2}}{\sqrt{y - 2}}$ .

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

Step 2.3

Combine and simplify the denominator.

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Step 2.3.1

Multiply $\frac{\sqrt{y + 2}}{\sqrt{y - 2}}$ by $\frac{\sqrt{y - 2}}{\sqrt{y - 2}}$ .

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

Step 2.3.2

Raise $\sqrt{y - 2}$ to the power of $1$ .

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

Step 2.3.3

Raise $\sqrt{y - 2}$ to the power of $1$ .

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

Step 2.3.4

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

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

Step 2.3.5

Add $1$ and $1$ .

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

Step 2.3.6

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

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Step 2.3.6.1

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

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

Step 2.3.6.2

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

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

Step 2.3.6.3

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

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

Step 2.3.6.4

Cancel the common factor of $2$ .

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Step 2.3.6.4.1

Cancel the common factor.

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

Step 2.3.6.4.2

Rewrite the expression.

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

Step 2.3.6.5

Simplify.

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

Step 2.4

Combine using the product rule for radicals.

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

Step 2.5

Rewrite $\sqrt{\frac{y - 2}{y + 2}}$ as $\frac{\sqrt{y - 2}}{\sqrt{y + 2}}$ .

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

Step 2.6

Multiply $\frac{\sqrt{y - 2}}{\sqrt{y + 2}}$ by $\frac{\sqrt{y + 2}}{\sqrt{y + 2}}$ .

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

Step 2.7

Combine and simplify the denominator.

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Step 2.7.1

Multiply $\frac{\sqrt{y - 2}}{\sqrt{y + 2}}$ by $\frac{\sqrt{y + 2}}{\sqrt{y + 2}}$ .

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

Step 2.7.2

Raise $\sqrt{y + 2}$ to the power of $1$ .

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

Step 2.7.3

Raise $\sqrt{y + 2}$ to the power of $1$ .

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

Step 2.7.4

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

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

Step 2.7.5

Add $1$ and $1$ .

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

Step 2.7.6

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

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Step 2.7.6.1

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

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

Step 2.7.6.2

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

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

Step 2.7.6.3

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

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

Step 2.7.6.4

Cancel the common factor of $2$ .

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Step 2.7.6.4.1

Cancel the common factor.

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

Step 2.7.6.4.2

Rewrite the expression.

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

Step 2.7.6.5

Simplify.

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

Step 2.8

Combine using the product rule for radicals.

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

Step 2.9

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

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

Step 2.10

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

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

Step 2.11

Write each expression with a common denominator of $(y - 2) (y + 2)$ , by multiplying each by an appropriate factor of $1$ .

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Step 2.11.1

Multiply $\frac{\sqrt{(y + 2) (y - 2)}}{y - 2}$ by $\frac{y + 2}{y + 2}$ .

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

Step 2.11.2

Multiply $\frac{\sqrt{(y - 2) (y + 2)}}{y + 2}$ by $\frac{y - 2}{y - 2}$ .

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

Step 2.11.3

Reorder the factors of $(y - 2) (y + 2)$ .

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

Step 2.12

Combine the numerators over the common denominator.

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

Step 2.13

Rewrite $\frac{\sqrt{(y + 2) (y - 2)} (y + 2) - \sqrt{(y - 2) (y + 2)} (y - 2)}{(y + 2) (y - 2)}$ in a factored form.

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Step 2.13.1

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

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

Step 2.13.2

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

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

Step 2.13.3

Expand $(y + 2) (y - 2)$ using the FOIL Method.

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Step 2.13.3.1

Apply the distributive property.

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

Step 2.13.3.2

Apply the distributive property.

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

Step 2.13.3.3

Apply the distributive property.

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

Step 2.13.4

Combine the opposite terms in $y \cdot y + y \cdot - 2 + 2 y + 2 \cdot - 2$ .

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Step 2.13.4.1

Reorder the factors in the terms $y \cdot - 2$ and $2 y$ .

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

Step 2.13.4.2

Add $- 2 y$ and $2 y$ .

$\frac{\frac{2 y {(y^{2} - 4)}^{\frac{1}{2}}}{(y + 2) (y - 2)}}{\frac{{(y \cdot y + 0 + 2 \cdot - 2)}^{\frac{1}{2}} (y + 2) - {((y - 2) (y + 2))}^{\frac{1}{2}} (y - 2)}{(y + 2) (y - 2)}}$

Step 2.13.4.3

Add $y \cdot y$ and $0$ .

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

Step 2.13.5

Simplify each term.

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Step 2.13.5.1

Multiply $y$ by $y$ .

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

Step 2.13.5.2

Multiply $2$ by $- 2$ .

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

Step 2.13.6

Apply the distributive property.

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

Step 2.13.7

Move $2$ to the left of ${(y^{2} - 4)}^{\frac{1}{2}}$ .

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

Step 2.13.8

Expand $(y - 2) (y + 2)$ using the FOIL Method.

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Step 2.13.8.1

Apply the distributive property.

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

Step 2.13.8.2

Apply the distributive property.

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

Step 2.13.8.3

Apply the distributive property.

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

Step 2.13.9

Combine the opposite terms in $y \cdot y + y \cdot 2 - 2 y - 2 \cdot 2$ .

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Step 2.13.9.1

Reorder the factors in the terms $y \cdot 2$ and $- 2 y$ .

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

Step 2.13.9.2

Subtract $2 y$ from $2 y$ .

$\frac{\frac{2 y {(y^{2} - 4)}^{\frac{1}{2}}}{(y + 2) (y - 2)}}{\frac{{(y^{2} - 4)}^{\frac{1}{2}} y + 2 {(y^{2} - 4)}^{\frac{1}{2}} - {(y \cdot y + 0 - 2 \cdot 2)}^{\frac{1}{2}} (y - 2)}{(y + 2) (y - 2)}}$

Step 2.13.9.3

Add $y \cdot y$ and $0$ .

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

Step 2.13.10

Simplify each term.

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Step 2.13.10.1

Multiply $y$ by $y$ .

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

Step 2.13.10.2

Multiply $- 2$ by $2$ .

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

Step 2.13.11

Apply the distributive property.

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

Step 2.13.12

Multiply $- 2$ by $- 1$ .

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

Step 2.13.13

Subtract ${(y^{2} - 4)}^{\frac{1}{2}} y$ from ${(y^{2} - 4)}^{\frac{1}{2}} y$ .

$\frac{\frac{2 y {(y^{2} - 4)}^{\frac{1}{2}}}{(y + 2) (y - 2)}}{\frac{2 {(y^{2} - 4)}^{\frac{1}{2}} + 0 + 2 {(y^{2} - 4)}^{\frac{1}{2}}}{(y + 2) (y - 2)}}$

Step 2.13.14

Add $2 {(y^{2} - 4)}^{\frac{1}{2}}$ and $0$ .

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

Step 2.13.15

Add $2 {(y^{2} - 4)}^{\frac{1}{2}}$ and $2 {(y^{2} - 4)}^{\frac{1}{2}}$ .

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

Step 3

Multiply the numerator by the reciprocal of the denominator.

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

Step 4

Combine.

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

Step 5

Factor $2$ out of $2 y {(y^{2} - 4)}^{\frac{1}{2}} ((y + 2) (y - 2))$ .

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

Step 6

Cancel the common factors.

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Step 6.1

Factor $2$ out of $(y + 2) (y - 2) (4 {(y^{2} - 4)}^{\frac{1}{2}})$ .

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

Step 6.2

Cancel the common factor.

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

Step 6.3

Rewrite the expression.

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

Step 7

Cancel the common factor.

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

Step 8

Rewrite the expression.

$\frac{y ((y + 2) (y - 2))}{(y + 2) (y - 2) \cdot (2)}$

Step 9

Cancel the common factor of $y + 2$ .

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Step 9.1

Cancel the common factor.

$\frac{y ((y + 2) (y - 2))}{(y + 2) (y - 2) \cdot 2}$

Step 9.2

Rewrite the expression.

$\frac{y (y - 2)}{(y - 2) \cdot (2)}$

Step 10

Cancel the common factor of $y - 2$ .

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Step 10.1

Cancel the common factor.

$\frac{y (y - 2)}{(y - 2) \cdot 2}$

Step 10.2

Rewrite the expression.

$\frac{y}{2}$