Question

найдите значение выражения?

Answer 1

3 6/7 =27/7;   a = √(27/7) =√ ((3*9)/7) =3√(3/7) =3*√3 /√7
1 5/7 =12/7;   b = √(12/7) = √(( 4*3)/7) =2√(3/7) =2*√3 /√7
175 = 7*25;   c = √(3/175) =√3/(5*√7)
(a-b) : c = a/c - b/c
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a/c =  3*√3 /√7  : [ √3/(5*√7) ]=3*5 =15
b/c = 2*√3/√7 :  [√3/(5*√7) ] = 2*5 =10
a/c -b/c = 15 -10 =5
   ответ 5

Answer 2

откуда 36 и 27

Answer 3

все поняла