Simplify - square root of 49

$- \sqrt{49}$

Step 1

Rewrite $49$ as $7^{2}$ .

$- \sqrt{7^{2}}$

Step 2

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

$- 1 \cdot 7$

Step 3

Multiply $- 1$ by $7$ .

$- 7$

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