Đáp án:
Giải thích các bước giải:
`c)`
`P=(1-(x-3\sqrt{x})/(x-9)):((\sqrt{x}-2)/(\sqrt{x}+3)-(-\sqrt{x}+3)/(2-\sqrt{x})+(-9+x)/(x+\sqrt{x}-6))`
`ĐK:x>0,x \ne 4,x \ne 9`
`P=(((x-9)-(x-3\sqrt{x}))/(x-9)):((\sqrt{x}-2)/(\sqrt{x}+3)-(\sqrt{x}-3)/(\sqrt{x}-2)+(-9+x)/(x+\sqrt{x}-6))`
`P=((3(\sqrt{x}-3))/[(\sqrt{x}-3)(\sqrt{x}+3)]):(((\sqrt{x}-2)^2-(\sqrt{x}+3)(\sqrt{x}-3)-9+x)/[(\sqrt{x}+3)(\sqrt{x}-2)])`
`P=(3)/[\sqrt{x}+3]:(\sqrt{x}-2)^2/[(\sqrt{x}+3)(\sqrt{x}-2)]`
`P=(3)/[\sqrt{x}+3]:(\sqrt{x}-2)/[\sqrt{x}+3]`
`P=(3)/[\sqrt{x}+3].(\sqrt{x}+3)/[\sqrt{x}-2]`
`P=(3))/[\sqrt{x}-2]`
