Evaluate square root of -27* square root of 3

$\sqrt{- 27} \cdot \sqrt{3}$

Step 1

Rewrite $- 27$ as $- 1 (27)$ .

$\sqrt{- 1 (27)} \cdot \sqrt{3}$

Step 2

Rewrite $\sqrt{- 1 (27)}$ as $\sqrt{- 1} \cdot \sqrt{27}$ .

$\sqrt{- 1} \cdot \sqrt{27} \cdot \sqrt{3}$

Step 3

Rewrite $\sqrt{- 1}$ as $i$ .

$i \cdot \sqrt{27} \cdot \sqrt{3}$

Step 4

Rewrite $27$ as $3^{2} \cdot 3$ .

Factor $9$ out of $27$ .

$i \cdot \sqrt{9 (3)} \cdot \sqrt{3}$

Rewrite $9$ as $3^{2}$ .

$i \cdot \sqrt{3^{2} \cdot 3} \cdot \sqrt{3}$

Step 5

Pull terms out from under the radical.

$i \cdot (3 \sqrt{3}) \cdot \sqrt{3}$

Step 6

Move $3$ to the left of $i$ .

$3 \cdot i \sqrt{3} \cdot \sqrt{3}$

Step 7

Multiply $3 i \sqrt{3} \sqrt{3}$ .

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

$3 i ({\sqrt{3}}^{1} \sqrt{3})$

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

$3 i ({\sqrt{3}}^{1} {\sqrt{3}}^{1})$

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

$3 i {\sqrt{3}}^{1 + 1}$

Add $1$ and $1$ .

$3 i {\sqrt{3}}^{2}$

Step 8

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

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

$3 i {(3^{\frac{1}{2}})}^{2}$

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

$3 i \cdot 3^{\frac{1}{2} \cdot 2}$

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

$3 i \cdot 3^{\frac{2}{2}}$

Cancel the common factor of $2$ .

Cancel the common factor.

$3 i \cdot 3^{\frac{2}{2}}$

Rewrite the expression.

$3 i \cdot 3^{1}$

Evaluate the exponent.

$3 i \cdot 3$

Step 9

Multiply $3$ by $3$ .

$9 i$

Evaluate square root of -27* square root of 3

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