2/x+1-1/x-2=3x-11/x+1nhanx-2 giup mk nha

        (2/x+1)-(1/x-2)=3x-11/(x+1)(x-2)    ;     ĐKXĐ: x $\neq$ 2, x $\neq$  +1

<=> 2(x – 2) – (x + 1) = 3x – 11
<=> 2x – 4 – x – 1 = 3x – 11
<=> x – 5 = 3x – 11
<=> x – 3x = 5 – 11
<=> – 2x = – 6

<=> x = 3
Vậy S = { 3 }

Học tốt!