Question

Answer 1

\(\Leftrightarrow x+3=6\sqrt{x}-6\)

=>x-6căn x+9=0

=>x=9

Answer 2

`[x+3]/[\sqrt{x}-1]=6`             `ĐK: x >= 0,x \ne 1`

`<=>x+3=6\sqrt{x}-6`

`<=>x-6\sqrt{x}+9=0`

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

`<=>\sqrt{x}-3=0`

`<=>\sqrt{x}=3`

`<=>x=9` (t/m)