Question

x+y:x-y,(x2+y2):(x+y)2 and( x2-y2)2:(x4-x4) find the compounded ratio pls answer fast

Answer 1

the compounded ratio of the ratios
(a:b), (c:d) and (e:f) is  ace ;bdf

(x+y) : (x-y) , (x²+y²) :(x+y)² : (x^4 -y^4) compounded ratio is 
 
(x+y)(x²+y²)(x²-y²) : (x-y) (x+y)²(x^4 - y^4)

= (x+y)[x^4 -y^4 ] : (x-y) (x+y)(x+y) [x^4-y^4]
after cancellation

= 1:(x-y)(x+y)

=1: (x²-y²)

Answer 2

since it is compound ratio ( a:b:c:d= a*c :b*d ) and so on ..