Question

(28radical din 21):(2 radical 108-8 radical 12)-(3 radical14):(5radical 50-4radical 72)

Answer 1

(28√21):(2√108-8√12)-(3√14):(5√50-4√72) =
=(28√21):(12√3-16√3)-(3√14):(25√2-24√2) =
=(28√21):(-4√3)-(3√14):√2 =
=-7√7-3√7 =
=-10√7