Question

simplify.
7√20

Explanation:

Step1: Factor radicand into square factor

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

Step2: Separate square root of factors

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

Step3: Multiply by the coefficient

$7 \times 2\sqrt{5}$

Answer:

$14\sqrt{5}$