Question

Помогите 4 пож,.,..,,.,.,.,..,,.,.

Answer 1

13/(x-2)+2/(x-13)=2
(13(x-13)+2(x-2))/(x-2)(x-13)=2
(13x-169+2x-4)/(x^2-13x-2x+26)=2
(15x-173)/(x^2-15x+26)=2
x^2-15x+26=7.5x-86.5
x^2-22.5x+112.5=0
D=506.25-450=56.25
x1=(22.5+7.5)/2=15
x2=(22.5-7.5)/2=7.5