`color{#1be01b}{-T}color{#1be01b}{i}color{#1be01b}{t}color{#1be01b}{u}color{#1be01b}{u}color{#1be01b}{u-}color{#1be01c}`

`P=(\sqrt{x}-3)/(\sqrt{x}-2)<=6 (x>=0; x!=4)`

`-> (\sqrt{x}-3)/(\sqrt{x}-2)-6<=0`

`-> (\sqrt{x}-3-6\sqrt{x}+12)/(\sqrt{x}-2)<=0`

`-> (9-5\sqrt{x})/(\sqrt{x}-2)<=0`

`_` `TH1: 9-5\sqrt{x}<=0; \sqrt{x}-2>=0`

`-> x>=4` 

Mà `x>=0; x!=4`

`-> x>4`

Lại có `x` $\in$ `ZZ`

`-> x` $\in$ `{5; 6; 7...}`

`_` `TH2: 9-5\sqrt{x}>=0; \sqrt{x}-2<=0`

`-> x<=(81)/(25)`

Mà `x>=0; x!=4`

`-> 0<=x<=(81)/(25)`

Lại có `x` $\in$ `ZZ`

`-> x` $\in$ `{0; 1; 2; 3}`