Finite Math Examples

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

Step 1

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

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

Step 2

Combine and simplify the denominator.

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Step 2.1

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

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

Step 2.2

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

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

Step 2.3

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

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

Step 2.4

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

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

Step 2.5

Add $1$ and $1$ .

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

Step 2.6

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

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Step 2.6.1

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

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

Step 2.6.2

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

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

Step 2.6.3

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

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

Step 2.6.4

Cancel the common factor of $2$ .

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Step 2.6.4.1

Cancel the common factor.

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

Step 2.6.4.2

Rewrite the expression.

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

Step 2.6.5

Simplify.

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

Step 3

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

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Step 3.1

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

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

Step 3.2

Cancel the common factors.

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Step 3.2.1

Factor $3$ out of $3 x$ .

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

Step 3.2.2

Cancel the common factor.

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

Step 3.2.3

Rewrite the expression.

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