Sum of roots for equation a(x*x)+bx+c=0 will be -b/a. so, now we get those two equation sum of roots as (1-2m)/m and 6/(3m+1) now equating them we get an equation as 6(m*m)+5m-1=0 on solving we get m values as -1 and 1/6 upon so adding them up we will get -5/6.