Evaluate square root of 169-25

$\sqrt{169 - 25}$

Step 1

Subtract $25$ from $169$ .

$\sqrt{144}$

Step 2

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

$\sqrt{12^{2}}$

Step 3

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

$12$

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