Thực hiện phép tính: 11x-5/x^2-25 + x-1/x+5

`(11x -5)/(x^2 -25) + (x -1)/(x +5)`

`= (11x -5)/((x -5)(x +5)) + (x -1)/(x +5)`

`= (11x -5)/((x -5)(x +5)) + ((x -1)(x  -5))/((x -5)(x +5)) `

`= (11x -5 + x^2  -6x +5)/((x -5)(x +5)) `

`= (x^2 + 5x )/((x -5)(x +5)) `

`= (x(x +5))/((x -5)(x +5)) `

`= x/(x -5)`