Evaluate - square root of 144

$- \sqrt{144}$

Step 1

Rewrite $144$ as $12^{2}$ .

$- \sqrt{12^{2}}$

Step 2

Multiply.

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

$- 1 \cdot 12$

Multiply $- 1$ by $12$ .

$- 12$

$- 12$

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