Simplify the Radical Expression 2/(3 cube root of 5)

$\frac{2}{3 \sqrt[3]{5}}$

Step 1

Multiply $\frac{2}{3 \sqrt[3]{5}}$ by $\frac{{\sqrt[3]{5}}^{2}}{{\sqrt[3]{5}}^{2}}$ .

$\frac{2}{3 \sqrt[3]{5}} \cdot \frac{{\sqrt[3]{5}}^{2}}{{\sqrt[3]{5}}^{2}}$

Step 2

Combine and simplify the denominator.

Multiply $\frac{2}{3 \sqrt[3]{5}}$ by $\frac{{\sqrt[3]{5}}^{2}}{{\sqrt[3]{5}}^{2}}$ .

$\frac{2 {\sqrt[3]{5}}^{2}}{3 \sqrt[3]{5} {\sqrt[3]{5}}^{2}}$

Move $\sqrt[3]{5}$ .

$\frac{2 {\sqrt[3]{5}}^{2}}{3 (\sqrt[3]{5} {\sqrt[3]{5}}^{2})}$

Raise $\sqrt[3]{5}$ to the power of $1$ .

$\frac{2 {\sqrt[3]{5}}^{2}}{3 ({\sqrt[3]{5}}^{1} {\sqrt[3]{5}}^{2})}$

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

$\frac{2 {\sqrt[3]{5}}^{2}}{3 {\sqrt[3]{5}}^{1 + 2}}$

Add $1$ and $2$ .

$\frac{2 {\sqrt[3]{5}}^{2}}{3 {\sqrt[3]{5}}^{3}}$

Rewrite ${\sqrt[3]{5}}^{3}$ as $5$ .

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt[3]{5}$ as $5^{\frac{1}{3}}$ .

$\frac{2 {\sqrt[3]{5}}^{2}}{3 {(5^{\frac{1}{3}})}^{3}}$

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

$\frac{2 {\sqrt[3]{5}}^{2}}{3 \cdot 5^{\frac{1}{3} \cdot 3}}$

Combine $\frac{1}{3}$ and $3$ .

$\frac{2 {\sqrt[3]{5}}^{2}}{3 \cdot 5^{\frac{3}{3}}}$

Cancel the common factor of $3$ .

Cancel the common factor.

$\frac{2 {\sqrt[3]{5}}^{2}}{3 \cdot 5^{\frac{3}{3}}}$

Rewrite the expression.

$\frac{2 {\sqrt[3]{5}}^{2}}{3 \cdot 5^{1}}$

Evaluate the exponent.

$\frac{2 {\sqrt[3]{5}}^{2}}{3 \cdot 5}$

Step 3

Simplify the numerator.

Rewrite ${\sqrt[3]{5}}^{2}$ as ${(5^{2})}^{\frac{1}{3}}$ .

$\frac{2 \sqrt[3]{5^{2}}}{3 \cdot 5}$

Raise $5$ to the power of $2$ .

$\frac{2 \sqrt[3]{25}}{3 \cdot 5}$

Step 4

Multiply $3$ by $5$ .

$\frac{2 \sqrt[3]{25}}{15}$

Step 5

The result can be shown in multiple forms.

Exact Form:

$\frac{2 \sqrt[3]{25}}{15}$

Decimal Form:

$0.38986903 \dots$