Giúp mik làm câu b bài tập này vs.mik cảm ơn Ạ

`P = (sqrt(x) - 2)/(sqrt(x + 1)) + (2 + 8sqrt(x))/(x - 1) - 2/(1 - sqrt(x))`

`= ( sqrt x -2)( sqrt x -1) ( sqrt x +0( sqrt x -1) + (2 + 8sqrt(x))/((sqrt(x) + 1)(sqrt(x) - 1)) + 2.( sqrt x +1) ( sqrt x +1)( sqrt x x^ -1 )`

`= (x - sqrt(x) - 2sqrt(x) + 2 + 2 + 8sqrt(x) + 2sqrt(x) + 2)/((sqrt(x) + 1)(sqrt(x) - 1))`

``

`P = (x + 7sqrt(x) + 6)/((sqrt(x) + 1)(sqrt(x) - 1))`

`= (x + 6sqrt(x) + sqrt(x) + 6)/((sqrt(x) + 1)(sqrt(x) - 1))`

`= ((sqrt(x) + 1)(sqrt(x) + 6))/((sqrt(x) + 1)(sqrt(x) - 1))`

`= (sqrt(x) + 6)/(sqrt(x) - 1)(đpcm)`

`@Sad2006`