Question

If a,b,y are positive real roots of the equation x^3-mx^2+12x-4n (m,n belongs to R) such that (a+b)(b+y)(y+a)=8aby then the value of (m+n) is A)12 B) 16 C)0. D) 8​

Answer 1

since m:n = 3 answer

let m= 6 n= 2

> m+n= 6+2= 8