Question

Помогите решить пожалуйста

Answer 1

2x/(x²-9) - 1/(x+3) = 2x/((x-3)(x+3)) - 1/(x+3) =
=2x/((x-3)(x+3)) -(x-3)/((x-3)(x+3)) =
=(2x-(x-3))/((x-3)(x+3))=
=(2x-x+3)/((x-3)(x+3))=
=(x+3)/((x-3)(x+3))=
=1/(x-3)