Question

$\sqrt{40} - \sqrt{20}$
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Answer 1

Step-by-step explanation:

$\sqrt{40} - \sqrt{20}$

$\sqrt{4 \times 10} - \sqrt{4 \times 5}$

$2 \sqrt{10} - 2 \sqrt{5}$

$2( \sqrt{10} - \sqrt{5} )$