Gấp ạ, giải đủ giúp em nhé

a)`P=((\sqrt{x}-1)/(3\sqrt{x}-1)-1/(3\sqrt{x}+1)+(8\sqrt{x})/(9x-1)):(1-(3\sqrt{x}-2)/(3\sqrt{x}+1))` 

`ĐK:{(x\ne1/9),(x≥0):}`

`P=((\sqrt{x}-1).(3\sqrt{x}+1)-(3\sqrt{x}-1)+(8\sqrt{x}))/(9x-1):(3\sqrt{x}+1-3\sqrt{x}+2)/(3\sqrt{x}+1)`

`P=(3x+\sqrt{x}-3\sqrt{x}-1+ 5\sqrt{x}+1)/(9x-1):3/(3\sqrt{x}+1)`

`P=(3x+3\sqrt{x})/(9x-1).(3\sqrt{x}+1)/3`

`P=(x+ \sqrt{x})/(3\sqrt{x}-1)`

b)Ta có:

`(x+ \sqrt{x})/(3\sqrt{x}-1)=6/5`

 `⇒5x+5\sqrt{x}=18\sqrt{x}-6`

`⇒5x-13\sqrt{x}+6=0`

`⇒ 5x-3\sqrt{x}-10\sqrt{x} +6=0`

`⇒5\sqrt{x}(\sqrt{x}-2)-3(\sqrt{x}-2)=0`

`⇒ (\sqrt{x}-2).(5\sqrt{x}-3)=0`

⇒\(\left[ \begin{array}{l}\sqrt{x}=2\\\sqrt{x}=3/5\end{array} \right.\) 

`⇒\(\left[ \begin{array}{l}x=4(t//m)\\x=9/4(t//m)\end{array} \right.\)`