Question

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simplify.
\sqrt{20}

Explanation:

Step1: Factor out perfect square

$\sqrt{20} = \sqrt{4 \times 5}$

Step2: Separate square roots

$\sqrt{4 \times 5} = \sqrt{4} \times \sqrt{5}$

Step3: Simplify perfect square root

$\sqrt{4} \times \sqrt{5} = 2\sqrt{5}$

Answer:

$2\sqrt{5}$