Question

$\sqrt{40}$

Explanation:

Step1: Factor 40 into perfect square

$\sqrt{40} = \sqrt{4 \times 10}$

Step2: Separate the square root terms

$\sqrt{4 \times 10} = \sqrt{4} \times \sqrt{10}$

Step3: Simplify the perfect square root

$\sqrt{4} \times \sqrt{10} = 2\sqrt{10}$

Answer:

$2\sqrt{10}$