.... . . . . .............
36/(x+3) + 36/(x-3) = 5 , x≠-3,x≠3 36(x-3) +36(x+3)=5.(x+3)(x-3) 36x-108 +36x+108 = 5(x²-9) 72x=5x²-45 5x²-72x-45=0, D=5184+900=6084, √D=√6084=78 x1=(72+78)/10=150/10=15 x2=(72-78)/10=-6/10=-0,6