Simplify square root of z/490

$\sqrt{\frac{z}{490}}$

Step 1

Rewrite $\frac{z}{490}$ as ${(\frac{1}{7})}^{2} \frac{z}{10}$ .

Factor the perfect power $1^{2}$ out of $z$ .

$\sqrt{\frac{1^{2} z}{490}}$

Factor the perfect power $7^{2}$ out of $490$ .

$\sqrt{\frac{1^{2} z}{7^{2} \cdot 10}}$

Rearrange the fraction $\frac{1^{2} z}{7^{2} \cdot 10}$ .

$\sqrt{{(\frac{1}{7})}^{2} \frac{z}{10}}$

Step 2

Pull terms out from under the radical.

$\frac{1}{7} \sqrt{\frac{z}{10}}$

Step 3

Rewrite $\sqrt{\frac{z}{10}}$ as $\frac{\sqrt{z}}{\sqrt{10}}$ .

$\frac{1}{7} \cdot \frac{\sqrt{z}}{\sqrt{10}}$

Step 4

Multiply $\frac{\sqrt{z}}{\sqrt{10}}$ by $\frac{\sqrt{10}}{\sqrt{10}}$ .

$\frac{1}{7} (\frac{\sqrt{z}}{\sqrt{10}} \cdot \frac{\sqrt{10}}{\sqrt{10}})$

Step 5

Combine and simplify the denominator.

Multiply $\frac{\sqrt{z}}{\sqrt{10}}$ by $\frac{\sqrt{10}}{\sqrt{10}}$ .

$\frac{1}{7} \cdot \frac{\sqrt{z} \sqrt{10}}{\sqrt{10} \sqrt{10}}$

Raise $\sqrt{10}$ to the power of $1$ .

$\frac{1}{7} \cdot \frac{\sqrt{z} \sqrt{10}}{{\sqrt{10}}^{1} \sqrt{10}}$

Raise $\sqrt{10}$ to the power of $1$ .

$\frac{1}{7} \cdot \frac{\sqrt{z} \sqrt{10}}{{\sqrt{10}}^{1} {\sqrt{10}}^{1}}$

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

$\frac{1}{7} \cdot \frac{\sqrt{z} \sqrt{10}}{{\sqrt{10}}^{1 + 1}}$

Add $1$ and $1$ .

$\frac{1}{7} \cdot \frac{\sqrt{z} \sqrt{10}}{{\sqrt{10}}^{2}}$

Rewrite ${\sqrt{10}}^{2}$ as $10$ .

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{10}$ as $10^{\frac{1}{2}}$ .

$\frac{1}{7} \cdot \frac{\sqrt{z} \sqrt{10}}{{(10^{\frac{1}{2}})}^{2}}$

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

$\frac{1}{7} \cdot \frac{\sqrt{z} \sqrt{10}}{10^{\frac{1}{2} \cdot 2}}$

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

$\frac{1}{7} \cdot \frac{\sqrt{z} \sqrt{10}}{10^{\frac{2}{2}}}$

Cancel the common factor of $2$ .

Cancel the common factor.

$\frac{1}{7} \cdot \frac{\sqrt{z} \sqrt{10}}{10^{\frac{2}{2}}}$

Rewrite the expression.

$\frac{1}{7} \cdot \frac{\sqrt{z} \sqrt{10}}{10^{1}}$

Evaluate the exponent.

$\frac{1}{7} \cdot \frac{\sqrt{z} \sqrt{10}}{10}$

Step 6

Combine using the product rule for radicals.

$\frac{1}{7} \cdot \frac{\sqrt{z \cdot 10}}{10}$

Step 7

Multiply $\frac{1}{7} \cdot \frac{\sqrt{z \cdot 10}}{10}$ .

Multiply $\frac{1}{7}$ by $\frac{\sqrt{z \cdot 10}}{10}$ .

$\frac{\sqrt{z \cdot 10}}{7 \cdot 10}$

Multiply $7$ by $10$ .

$\frac{\sqrt{z \cdot 10}}{70}$

Step 8

Reorder factors in $\frac{\sqrt{z \cdot 10}}{70}$ .

$\frac{\sqrt{10 z}}{70}$

Simplify square root of z/490

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