Algebra Examples

$\frac{5}{2 - 2 \sqrt{6}}$

Step 1

Multiply $\frac{5}{2 - 2 \sqrt{6}}$ by $\frac{2 + 2 \sqrt{6}}{2 + 2 \sqrt{6}}$ .

$\frac{5}{2 - 2 \sqrt{6}} \cdot \frac{2 + 2 \sqrt{6}}{2 + 2 \sqrt{6}}$

Step 2

Multiply $\frac{5}{2 - 2 \sqrt{6}}$ by $\frac{2 + 2 \sqrt{6}}{2 + 2 \sqrt{6}}$ .

$\frac{5 (2 + 2 \sqrt{6})}{(2 - 2 \sqrt{6}) (2 + 2 \sqrt{6})}$

Step 3

Expand the denominator using the FOIL method.

$\frac{5 (2 + 2 \sqrt{6})}{4 + 4 \sqrt{6} - 4 \sqrt{6} - 4 {\sqrt{6}}^{2}}$

Step 4

Simplify.

$\frac{5 (2 + 2 \sqrt{6})}{- 20}$

Step 5

Cancel the common factors.

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Step 5.1

Factor $5$ out of $- 20$ .

$\frac{5 (2 + 2 \sqrt{6})}{5 \cdot - 4}$

Step 5.2

Cancel the common factor.

$\frac{5 (2 + 2 \sqrt{6})}{5 \cdot - 4}$

Step 5.3

Rewrite the expression.

$\frac{2 + 2 \sqrt{6}}{- 4}$

Step 6

Cancel the common factor of $2 + 2 \sqrt{6}$ and $- 4$ .

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Step 6.1

Factor $2$ out of $2$ .

$\frac{2 \cdot 1 + 2 \sqrt{6}}{- 4}$

Step 6.2

Factor $2$ out of $2 \sqrt{6}$ .

$\frac{2 \cdot 1 + 2 (\sqrt{6})}{- 4}$

Step 6.3

Factor $2$ out of $2 \cdot 1 + 2 (\sqrt{6})$ .

$\frac{2 \cdot (1 + \sqrt{6})}{- 4}$

Step 6.4

Cancel the common factors.

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Step 6.4.1

Factor $2$ out of $- 4$ .

$\frac{2 \cdot (1 + \sqrt{6})}{2 (- 2)}$

Step 6.4.2

Cancel the common factor.

$\frac{2 \cdot (1 + \sqrt{6})}{2 \cdot - 2}$

Step 6.4.3

Rewrite the expression.

$\frac{1 + \sqrt{6}}{- 2}$

Step 7

Move the negative in front of the fraction.

$- \frac{1 + \sqrt{6}}{2}$

Step 8

The result can be shown in multiple forms.

Exact Form:

$- \frac{1 + \sqrt{6}}{2}$

Decimal Form:

$- 1.72474487 \dots$