Evaluate 21/( square root of 3)

$\frac{21}{\sqrt{3}}$

Step 1

Multiply $\frac{21}{\sqrt{3}}$ by $\frac{\sqrt{3}}{\sqrt{3}}$ .

$\frac{21}{\sqrt{3}} \cdot \frac{\sqrt{3}}{\sqrt{3}}$

Step 2

Combine and simplify the denominator.

Multiply $\frac{21}{\sqrt{3}}$ by $\frac{\sqrt{3}}{\sqrt{3}}$ .

$\frac{21 \sqrt{3}}{\sqrt{3} \sqrt{3}}$

Raise $\sqrt{3}$ to the power of $1$ .

$\frac{21 \sqrt{3}}{{\sqrt{3}}^{1} \sqrt{3}}$

Raise $\sqrt{3}$ to the power of $1$ .

$\frac{21 \sqrt{3}}{{\sqrt{3}}^{1} {\sqrt{3}}^{1}}$

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\frac{21 \sqrt{3}}{{\sqrt{3}}^{1 + 1}}$

Add $1$ and $1$ .

$\frac{21 \sqrt{3}}{{\sqrt{3}}^{2}}$

Rewrite ${\sqrt{3}}^{2}$ as $3$ .

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{3}$ as $3^{\frac{1}{2}}$ .

$\frac{21 \sqrt{3}}{{(3^{\frac{1}{2}})}^{2}}$

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$\frac{21 \sqrt{3}}{3^{\frac{1}{2} \cdot 2}}$

Combine $\frac{1}{2}$ and $2$ .

$\frac{21 \sqrt{3}}{3^{\frac{2}{2}}}$

Cancel the common factor of $2$ .

Cancel the common factor.

$\frac{21 \sqrt{3}}{3^{\frac{2}{2}}}$

Rewrite the expression.

$\frac{21 \sqrt{3}}{3^{1}}$

Evaluate the exponent.

$\frac{21 \sqrt{3}}{3}$

Step 3

Cancel the common factor of $21$ and $3$ .

Factor $3$ out of $21 \sqrt{3}$ .

$\frac{3 (7 \sqrt{3})}{3}$

Cancel the common factors.

Factor $3$ out of $3$ .

$\frac{3 (7 \sqrt{3})}{3 (1)}$

Cancel the common factor.

$\frac{3 (7 \sqrt{3})}{3 \cdot 1}$

Rewrite the expression.

$\frac{7 \sqrt{3}}{1}$

Divide $7 \sqrt{3}$ by $1$ .

$7 \sqrt{3}$

Step 4

The result can be shown in multiple forms.

Exact Form:

$7 \sqrt{3}$

Decimal Form:

$12.12435565 \dots$

Evaluate 21/( square root of 3)

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