Simplify the Radical Expression square root of 4x

$\sqrt{4 x}$

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

$\sqrt{2^{2} x}$

Pull terms out from under the radical.

$| 2 | \sqrt{x}$

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

$2 \sqrt{x}$