Evaluate square root of (-9)^2

$\sqrt{{(- 9)}^{2}}$

Step 1

Raise $- 9$ to the power of $2$ .

$\sqrt{81}$

Step 2

Rewrite $81$ as $9^{2}$ .

$\sqrt{9^{2}}$

Step 3

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

$9$

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