Evaluate - square root of 169

$- \sqrt{169}$

Step 1

Rewrite $169$ as $13^{2}$ .

$- \sqrt{13^{2}}$

Step 2

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

$- 1 \cdot 13$

Step 3

Multiply $- 1$ by $13$ .

$- 13$

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