Algebra Examples

\frac{2}{\sqrt{5}}

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

Step 1

Multiply

\frac{2}{\sqrt{5}}

$\frac{2}{\sqrt{5}}$ by

\frac{\sqrt{5}}{\sqrt{5}}

$\frac{\sqrt{5}}{\sqrt{5}}$ .

\frac{2}{\sqrt{5}} \cdot \frac{\sqrt{5}}{\sqrt{5}}

$\frac{2}{\sqrt{5}} \cdot \frac{\sqrt{5}}{\sqrt{5}}$

Step 2

Combine and simplify the denominator.

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Step 2.1

Multiply

\frac{2}{\sqrt{5}}

$\frac{2}{\sqrt{5}}$ by

\frac{\sqrt{5}}{\sqrt{5}}

$\frac{\sqrt{5}}{\sqrt{5}}$ .

\frac{2 \sqrt{5}}{\sqrt{5} \sqrt{5}}

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

Step 2.2

Raise

\sqrt{5}

$\sqrt{5}$ to the power of

1

$1$ .

\frac{2 \sqrt{5}}{{\sqrt{5}}^{1} \sqrt{5}}

$\frac{2 \sqrt{5}}{{\sqrt{5}}^{1} \sqrt{5}}$

Step 2.3

Raise

\sqrt{5}

$\sqrt{5}$ to the power of

1

$1$ .

\frac{2 \sqrt{5}}{{\sqrt{5}}^{1} {\sqrt{5}}^{1}}

$\frac{2 \sqrt{5}}{{\sqrt{5}}^{1} {\sqrt{5}}^{1}}$

Step 2.4

Use the power rule

a^{m} a^{n} = a^{m + n}

$a^{m} a^{n} = a^{m + n}$ to combine exponents.

\frac{2 \sqrt{5}}{{\sqrt{5}}^{1 + 1}}

$\frac{2 \sqrt{5}}{{\sqrt{5}}^{1 + 1}}$

Step 2.5

Add

1

$1$ and

1

$1$ .

\frac{2 \sqrt{5}}{{\sqrt{5}}^{2}}

$\frac{2 \sqrt{5}}{{\sqrt{5}}^{2}}$

Step 2.6

Rewrite

{\sqrt{5}}^{2}

${\sqrt{5}}^{2}$ as

5

$5$ .

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Step 2.6.1

Use

\sqrt[n]{a^{x}} = a^{\frac{x}{n}}

$\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite

\sqrt{5}

$\sqrt{5}$ as

5^{\frac{1}{2}}

$5^{\frac{1}{2}}$ .

\frac{2 \sqrt{5}}{{(5^{\frac{1}{2}})}^{2}}

$\frac{2 \sqrt{5}}{{(5^{\frac{1}{2}})}^{2}}$

Step 2.6.2

Apply the power rule and multiply exponents,

{(a^{m})}^{n} = a^{m n}

${(a^{m})}^{n} = a^{m n}$ .

\frac{2 \sqrt{5}}{5^{\frac{1}{2} \cdot 2}}

$\frac{2 \sqrt{5}}{5^{\frac{1}{2} \cdot 2}}$

Step 2.6.3

Combine

\frac{1}{2}

$\frac{1}{2}$ and

2

$2$ .

\frac{2 \sqrt{5}}{5^{\frac{2}{2}}}

$\frac{2 \sqrt{5}}{5^{\frac{2}{2}}}$

Step 2.6.4

Cancel the common factor of

2

$2$ .

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Step 2.6.4.1

Cancel the common factor.

\frac{2 \sqrt{5}}{5^{\frac{2}{2}}}

$\frac{2 \sqrt{5}}{5^{\frac{2}{2}}}$

Step 2.6.4.2

Rewrite the expression.

\frac{2 \sqrt{5}}{5^{1}}

$\frac{2 \sqrt{5}}{5^{1}}$

\frac{2 \sqrt{5}}{5^{1}}

$\frac{2 \sqrt{5}}{5^{1}}$

Step 2.6.5

Evaluate the exponent.

\frac{2 \sqrt{5}}{5}

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

\frac{2 \sqrt{5}}{5}

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

\frac{2 \sqrt{5}}{5}

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

Step 3

The result can be shown in multiple forms.

Exact Form:

\frac{2 \sqrt{5}}{5}

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

Decimal Form:

0.89442719 \dots

$0.89442719 \dots$

⎡ ⎢ ⎣ \begin{matrix} x^{2} & \frac{1}{2} \sqrt{π} & \int x d x \end{matrix} ⎤ ⎥ ⎦

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$