Simplify the Radical Expression 3 square root of 8

$3 \sqrt{8}$

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

Factor $4$ out of $8$ .

$3 \sqrt{4 (2)}$

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

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

Pull terms out from under the radical.

$3 (| 2 | \sqrt{2})$

The absolute value is the distance between a number and zero. The distance between $0$ and $2$ is $2$ .

$3 (2 \sqrt{2})$

Multiply $2$ by $3$ .

$6 \sqrt{2}$

The result can be shown in multiple forms.

Exact Form:

$6 \sqrt{2}$

Decimal Form:

$8.48528137 \dots$