Algebra Examples

$\frac{2 - \sqrt{8}}{4 + \sqrt{12}}$

Step 1

Simplify the numerator.

Tap for more steps...

Step 1.1

Rewrite $8$ as $2^{2} \cdot 2$ .

Tap for more steps...

Step 1.1.1

Factor $4$ out of $8$ .

$\frac{2 - \sqrt{4 (2)}}{4 + \sqrt{12}}$

Step 1.1.2

Rewrite $4$ as $2^{2}$ .

$\frac{2 - \sqrt{2^{2} \cdot 2}}{4 + \sqrt{12}}$

Step 1.2

Pull terms out from under the radical.

$\frac{2 - (2 \sqrt{2})}{4 + \sqrt{12}}$

Step 1.3

Multiply $2$ by $- 1$ .

$\frac{2 - 2 \sqrt{2}}{4 + \sqrt{12}}$

Step 2

Simplify the denominator.

Tap for more steps...

Step 2.1

Rewrite $12$ as $2^{2} \cdot 3$ .

Tap for more steps...

Step 2.1.1

Factor $4$ out of $12$ .

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

Step 2.1.2

Rewrite $4$ as $2^{2}$ .

$\frac{2 - 2 \sqrt{2}}{4 + \sqrt{2^{2} \cdot 3}}$

Step 2.2

Pull terms out from under the radical.

$\frac{2 - 2 \sqrt{2}}{4 + 2 \sqrt{3}}$

Step 3

Cancel the common factor of $2 - 2 \sqrt{2}$ and $4 + 2 \sqrt{3}$ .

Tap for more steps...

Step 3.1

Factor $2$ out of $2$ .

$\frac{2 \cdot 1 - 2 \sqrt{2}}{4 + 2 \sqrt{3}}$

Step 3.2

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

$\frac{2 \cdot 1 + 2 (- \sqrt{2})}{4 + 2 \sqrt{3}}$

Step 3.3

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

$\frac{2 (1 - \sqrt{2})}{4 + 2 \sqrt{3}}$

Step 3.4

Cancel the common factors.

Tap for more steps...

Step 3.4.1

Factor $2$ out of $4$ .

$\frac{2 (1 - \sqrt{2})}{2 (2) + 2 \sqrt{3}}$

Step 3.4.2

Factor $2$ out of $2 \sqrt{3}$ .

$\frac{2 (1 - \sqrt{2})}{2 (2) + 2 (\sqrt{3})}$

Step 3.4.3

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

$\frac{2 (1 - \sqrt{2})}{2 (2 + \sqrt{3})}$

Step 3.4.4

Cancel the common factor.

$\frac{2 (1 - \sqrt{2})}{2 (2 + \sqrt{3})}$

Step 3.4.5

Rewrite the expression.

$\frac{1 - \sqrt{2}}{2 + \sqrt{3}}$

Step 4

Multiply $\frac{1 - \sqrt{2}}{2 + \sqrt{3}}$ by $\frac{2 - \sqrt{3}}{2 - \sqrt{3}}$ .

$\frac{1 - \sqrt{2}}{2 + \sqrt{3}} \cdot \frac{2 - \sqrt{3}}{2 - \sqrt{3}}$

Step 5

Combine fractions.

Tap for more steps...

Step 5.1

Multiply $\frac{1 - \sqrt{2}}{2 + \sqrt{3}}$ by $\frac{2 - \sqrt{3}}{2 - \sqrt{3}}$ .

$\frac{(1 - \sqrt{2}) (2 - \sqrt{3})}{(2 + \sqrt{3}) (2 - \sqrt{3})}$

Step 5.2

Expand the denominator using the FOIL method.

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

Step 5.3

Simplify.

$\frac{(1 - \sqrt{2}) (2 - \sqrt{3})}{1}$

Step 5.4

Divide $(1 - \sqrt{2}) (2 - \sqrt{3})$ by $1$ .

$(1 - \sqrt{2}) (2 - \sqrt{3})$

Step 6

Expand $(1 - \sqrt{2}) (2 - \sqrt{3})$ using the FOIL Method.

Tap for more steps...

Step 6.1

Apply the distributive property.

$1 (2 - \sqrt{3}) - \sqrt{2} (2 - \sqrt{3})$

Step 6.2

Apply the distributive property.

$1 \cdot 2 + 1 (- \sqrt{3}) - \sqrt{2} (2 - \sqrt{3})$

Step 6.3

Apply the distributive property.

$1 \cdot 2 + 1 (- \sqrt{3}) - \sqrt{2} \cdot 2 - \sqrt{2} (- \sqrt{3})$

Step 7

Simplify each term.

Tap for more steps...

Step 7.1

Multiply $2$ by $1$ .

$2 + 1 (- \sqrt{3}) - \sqrt{2} \cdot 2 - \sqrt{2} (- \sqrt{3})$

Step 7.2

Multiply $- \sqrt{3}$ by $1$ .

$2 - \sqrt{3} - \sqrt{2} \cdot 2 - \sqrt{2} (- \sqrt{3})$

Step 7.3

Multiply $2$ by $- 1$ .

$2 - \sqrt{3} - 2 \sqrt{2} - \sqrt{2} (- \sqrt{3})$

Step 7.4

Multiply $- \sqrt{2} (- \sqrt{3})$ .

Tap for more steps...

Step 7.4.1

Multiply $- 1$ by $- 1$ .

$2 - \sqrt{3} - 2 \sqrt{2} + 1 \sqrt{2} \sqrt{3}$

Step 7.4.2

Multiply $\sqrt{2}$ by $1$ .

$2 - \sqrt{3} - 2 \sqrt{2} + \sqrt{2} \sqrt{3}$

Step 7.4.3

Combine using the product rule for radicals.

$2 - \sqrt{3} - 2 \sqrt{2} + \sqrt{2 \cdot 3}$

Step 7.4.4

Multiply $2$ by $3$ .

$2 - \sqrt{3} - 2 \sqrt{2} + \sqrt{6}$

Step 8

The result can be shown in multiple forms.

Exact Form:

$2 - \sqrt{3} - 2 \sqrt{2} + \sqrt{6}$

Decimal Form:

$- 0.11098818 \dots$