Simplify (5 square root of 56)/( square root of 21)

$\frac{5 \sqrt{56}}{\sqrt{21}}$

Step 1

Combine $\sqrt{56}$ and $\sqrt{21}$ into a single radical.

$5 \sqrt{\frac{56}{21}}$

Step 2

Cancel the common factor of $56$ and $21$ .

Factor $7$ out of $56$ .

$5 \sqrt{\frac{7 (8)}{21}}$

Cancel the common factors.

Factor $7$ out of $21$ .

$5 \sqrt{\frac{7 \cdot 8}{7 \cdot 3}}$

Cancel the common factor.

$5 \sqrt{\frac{7 \cdot 8}{7 \cdot 3}}$

Rewrite the expression.

$5 \sqrt{\frac{8}{3}}$

Step 3

Rewrite $\sqrt{\frac{8}{3}}$ as $\frac{\sqrt{8}}{\sqrt{3}}$ .

$5 \frac{\sqrt{8}}{\sqrt{3}}$

Step 4

Simplify the numerator.

Rewrite $8$ as $2^{2} \cdot 2$ .

Factor $4$ out of $8$ .

$5 \frac{\sqrt{4 (2)}}{\sqrt{3}}$

Rewrite $4$ as $2^{2}$ .

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

Pull terms out from under the radical.

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

Step 5

Multiply $\frac{2 \sqrt{2}}{\sqrt{3}}$ by $\frac{\sqrt{3}}{\sqrt{3}}$ .

$5 (\frac{2 \sqrt{2}}{\sqrt{3}} \cdot \frac{\sqrt{3}}{\sqrt{3}})$

Step 6

Combine and simplify the denominator.

Multiply $\frac{2 \sqrt{2}}{\sqrt{3}}$ by $\frac{\sqrt{3}}{\sqrt{3}}$ .

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

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

$5 \frac{2 \sqrt{2} \sqrt{3}}{{\sqrt{3}}^{1} \sqrt{3}}$

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

$5 \frac{2 \sqrt{2} \sqrt{3}}{{\sqrt{3}}^{1} {\sqrt{3}}^{1}}$

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

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

Add $1$ and $1$ .

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

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

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

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

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

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

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

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

Cancel the common factor of $2$ .

Cancel the common factor.

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

Rewrite the expression.

$5 \frac{2 \sqrt{2} \sqrt{3}}{3^{1}}$

Evaluate the exponent.

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

Step 7

Simplify the numerator.

Combine using the product rule for radicals.

$5 \frac{2 \sqrt{3 \cdot 2}}{3}$

Multiply $3$ by $2$ .

$5 \frac{2 \sqrt{6}}{3}$

Step 8

Multiply $5 \frac{2 \sqrt{6}}{3}$ .

Combine $5$ and $\frac{2 \sqrt{6}}{3}$ .

$\frac{5 (2 \sqrt{6})}{3}$

Multiply $2$ by $5$ .

$\frac{10 \sqrt{6}}{3}$

Step 9

The result can be shown in multiple forms.

Exact Form:

$\frac{10 \sqrt{6}}{3}$

Decimal Form:

$8.16496580 \dots$

Simplify (5 square root of 56)/( square root of 21)

Related Questions

Support LCMGCF.com by disabling your adblocker.