Question

2корень 125+2 rкорень20-2 корень 80=

Answer 1

$2sqrt{125}+2sqrt{20}-2sqrt{80} = 10sqrt{5}+4sqrt{5}-8sqrt{5} = 6sqrt{5}.$

Answer 2

2*√125 + 2*√20 - 2*√80 = 2 * 5 * √5 - 2 * 2 * √5 - 2 * 4 √5 = √5 * (10 + 4 - 8) = 6 * √5