4/(x^2+6x+9)+6/(9-x^2)=1/(x-3)
4/((x+3)(x+3))-6/((x-3)(x+3))-1/(x-3)=0
(4(x-3)-6(x+3)-(x+3)^2)/((x+3)^2(x-3))=0
(4(x-3)-6(x+3)-(x+3)^2)=0
4x-12-6x-18-x^2-6x-9=0
-x^2-8x-39=0
x^2+8x+39=0
D=b^2-4ac=-92
D<0 - уравнение не имеет решений
4/(x²+6x+9)+6/(9-x²)=1/(x-3)
4(x-3)-6(x+3)-(x+3)^2 = 0
4x-12-6x-18-x^2-6x-9=0
-x^2-8x-39=0
x^2 + 8x + 39 = 0 D<0 корней нет
