Simplify 3- square root of 4x^2

$3 - \sqrt{4 x^{2}}$

Step 1

Rewrite $4 x^{2}$ as ${(2 x)}^{2}$ .

$3 - \sqrt{{(2 x)}^{2}}$

Step 2

Pull terms out from under the radical, assuming positive real numbers.

$3 - (2 x)$

Step 3

Multiply $2$ by $- 1$ .

$3 - 2 x$

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