Х -4 / х - 3 + 6 / х^2 - 9 = 1/2
2( х + 3)*(х -4) / х - 3 + 2* 6 / х^2 - 9 = (х^2 - 9)*1/2
2( х + 3)*(х -4) + 2* 6 - (х^2 - 9) / 2 * (х^2 - 9) =0
(2х^2 + 6x -8х -24 + 12 - х^2 + 9) / 2 * (х^2 - 9) =0
(х^2 -2х -3) / 2 * (х^2 - 9) =0
х^2 -2х -3=0
D= 4 - 4*1*(-3)= 4 + 12 = 16
x1 = 2 + 4 / 2 = 3
x2 = 2 - 4 / 2 = -1
тогда множители х^2 -2х -3= (х - 3)(х + 1)
(х - 3)(х + 1) / 2 * (х^2 - 9) =0
(х - 3)(х + 1) / 2 * (х - 3)*(х + 3) =0
(х + 1) / 2 * (х + 3) =0
1. (х + 1)=0 х = -1
2. 2 * (х + 3) =0 х = -3