Basic Math Examples

\sqrt{\frac{10}{21}}

$\sqrt{\frac{10}{21}}$

Step 1

Rewrite

\sqrt{\frac{10}{21}}

$\sqrt{\frac{10}{21}}$ as

\frac{\sqrt{10}}{\sqrt{21}}

$\frac{\sqrt{10}}{\sqrt{21}}$ .

\frac{\sqrt{10}}{\sqrt{21}}

$\frac{\sqrt{10}}{\sqrt{21}}$

Step 2

Multiply

\frac{\sqrt{10}}{\sqrt{21}}

$\frac{\sqrt{10}}{\sqrt{21}}$ by

\frac{\sqrt{21}}{\sqrt{21}}

$\frac{\sqrt{21}}{\sqrt{21}}$ .

\frac{\sqrt{10}}{\sqrt{21}} \cdot \frac{\sqrt{21}}{\sqrt{21}}

$\frac{\sqrt{10}}{\sqrt{21}} \cdot \frac{\sqrt{21}}{\sqrt{21}}$

Step 3

Combine and simplify the denominator.

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Step 3.1

Multiply

\frac{\sqrt{10}}{\sqrt{21}}

$\frac{\sqrt{10}}{\sqrt{21}}$ by

\frac{\sqrt{21}}{\sqrt{21}}

$\frac{\sqrt{21}}{\sqrt{21}}$ .

\frac{\sqrt{10} \sqrt{21}}{\sqrt{21} \sqrt{21}}

$\frac{\sqrt{10} \sqrt{21}}{\sqrt{21} \sqrt{21}}$

Step 3.2

Raise

\sqrt{21}

$\sqrt{21}$ to the power of

1

$1$ .

\frac{\sqrt{10} \sqrt{21}}{{\sqrt{21}}^{1} \sqrt{21}}

$\frac{\sqrt{10} \sqrt{21}}{{\sqrt{21}}^{1} \sqrt{21}}$

Step 3.3

Raise

\sqrt{21}

$\sqrt{21}$ to the power of

1

$1$ .

\frac{\sqrt{10} \sqrt{21}}{{\sqrt{21}}^{1} {\sqrt{21}}^{1}}

$\frac{\sqrt{10} \sqrt{21}}{{\sqrt{21}}^{1} {\sqrt{21}}^{1}}$

Step 3.4

Use the power rule

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

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

\frac{\sqrt{10} \sqrt{21}}{{\sqrt{21}}^{1 + 1}}

$\frac{\sqrt{10} \sqrt{21}}{{\sqrt{21}}^{1 + 1}}$

Step 3.5

Add

1

$1$ and

1

$1$ .

\frac{\sqrt{10} \sqrt{21}}{{\sqrt{21}}^{2}}

$\frac{\sqrt{10} \sqrt{21}}{{\sqrt{21}}^{2}}$

Step 3.6

Rewrite

{\sqrt{21}}^{2}

${\sqrt{21}}^{2}$ as

21

$21$ .

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Step 3.6.1

Use

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

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

\sqrt{21}

$\sqrt{21}$ as

21^{\frac{1}{2}}

$21^{\frac{1}{2}}$ .

\frac{\sqrt{10} \sqrt{21}}{{(21^{\frac{1}{2}})}^{2}}

$\frac{\sqrt{10} \sqrt{21}}{{(21^{\frac{1}{2}})}^{2}}$

Step 3.6.2

Apply the power rule and multiply exponents,

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

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

\frac{\sqrt{10} \sqrt{21}}{21^{\frac{1}{2} \cdot 2}}

$\frac{\sqrt{10} \sqrt{21}}{21^{\frac{1}{2} \cdot 2}}$

Step 3.6.3

Combine

\frac{1}{2}

$\frac{1}{2}$ and

2

$2$ .

\frac{\sqrt{10} \sqrt{21}}{21^{\frac{2}{2}}}

$\frac{\sqrt{10} \sqrt{21}}{21^{\frac{2}{2}}}$

Step 3.6.4

Cancel the common factor of

2

$2$ .

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Step 3.6.4.1

Cancel the common factor.

$\frac{\sqrt{10} \sqrt{21}}{21^{\frac{2}{2}}}$

Step 3.6.4.2

Rewrite the expression.

$\frac{\sqrt{10} \sqrt{21}}{21^{1}}$

Step 3.6.5

Evaluate the exponent.

$\frac{\sqrt{10} \sqrt{21}}{21}$

Step 4

Simplify the numerator.

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Step 4.1

Combine using the product rule for radicals.

$\frac{\sqrt{10 \cdot 21}}{21}$

Step 4.2

Multiply

$10$ by

$21$ .

$\frac{\sqrt{210}}{21}$

Step 5

The result can be shown in multiple forms.

Exact Form:

$\frac{\sqrt{210}}{21}$

Decimal Form:

$0.69006555 \dots$