Algebra Examples

$\frac{8}{3 - \sqrt{11}}$

Step 1

Multiply $\frac{8}{3 - \sqrt{11}}$ by $\frac{3 + \sqrt{11}}{3 + \sqrt{11}}$ .

$\frac{8}{3 - \sqrt{11}} \cdot \frac{3 + \sqrt{11}}{3 + \sqrt{11}}$

Step 2

Multiply $\frac{8}{3 - \sqrt{11}}$ by $\frac{3 + \sqrt{11}}{3 + \sqrt{11}}$ .

$\frac{8 (3 + \sqrt{11})}{(3 - \sqrt{11}) (3 + \sqrt{11})}$

Step 3

Expand the denominator using the FOIL method.

$\frac{8 (3 + \sqrt{11})}{9 + 3 \sqrt{11} - 3 \sqrt{11} - {\sqrt{11}}^{2}}$

Step 4

Simplify.

$\frac{8 (3 + \sqrt{11})}{- 2}$

Step 5

Cancel the common factor of $8$ and $- 2$ .

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Step 5.1

Factor $2$ out of $8 (3 + \sqrt{11})$ .

$\frac{2 (4 (3 + \sqrt{11}))}{- 2}$

Step 5.2

Move the negative one from the denominator of $\frac{4 (3 + \sqrt{11})}{- 1}$ .

$- 1 \cdot (4 (3 + \sqrt{11}))$

Step 6

Rewrite $- 1 \cdot (4 (3 + \sqrt{11}))$ as $- (4 (3 + \sqrt{11}))$ .

$- (4 (3 + \sqrt{11}))$

Step 7

Apply the distributive property.

$- (4 \cdot 3 + 4 \sqrt{11})$

Step 8

Multiply $4$ by $3$ .

$- (12 + 4 \sqrt{11})$

Step 9

Apply the distributive property.

$- 1 \cdot 12 - (4 \sqrt{11})$

Step 10

Multiply.

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Step 10.1

Multiply $- 1$ by $12$ .

$- 12 - (4 \sqrt{11})$

Step 10.2

Multiply $4$ by $- 1$ .

$- 12 - 4 \sqrt{11}$

Step 11

The result can be shown in multiple forms.

Exact Form:

$- 12 - 4 \sqrt{11}$

Decimal Form:

$- 25.26649916 \dots$