никак не получается решить(( помогите Теме: теорема Виета

Ответ
x^2 + 12x - 17 = 0

{ x1 + x2 = -12
{ x1 * x2 = -17

(34 - 15x2) / x2 + (34 + 13x1) / x1 =
= [x1*(34 - 15x2) + x2*(34+13x1)] /x1*x2 =
= (34x1 - 15*x1*x2 + 34x2 + 13*x1*x2) / x1*x2 =
= [(34x1 + 34x2) + (13x1*x2 - 15x1*x2)] / x1*x2 =
= [34 * (x1+x2) - 2 * x1*x2] / x1*x2 =
= [34 * (-12) - 2 * (-17)] / (-17) =
= (- 34*12 + 34) / (-17) =
= 34 * (+12 - 1) / (+17) =
= 2*11 = 22