Simplify 3 square root of 9

$3 \sqrt{9}$

Step 1

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

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

Step 2

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

$3 \cdot 3$

Step 3

Multiply $3$ by $3$ .

$9$

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