Выражение (3/x-3-x)+(15/x^2-/x) ! завтра сдавать.

3/(x -3) -(x +15)/(x² -9) - 2/x =

=(3x(x+3) -x(x +15) -2(x -3)(x +3)) /x(x -3)(x+3) =

=((3x² +9x -x² -15x -2(x² -9)) /x(x -3)(x +3) =

=(2x² -6x -2x² +18) /x(x -3)(x +3) =

=(-6x +18) /x(x -3)(x +3) =

= -6(x -3) /x(x -3)(x +3) =

= -6 /x(x+3).

(3/x-3)-(x+15/x^2-9)-(2/x) =