g)`x+\sqrt(3x+1)-3=0(-1/3<=x<=3)`

`->\sqrt(3x+1)=3-x`

`->3x+1=x^2-6x+9`

`->x^2-9x+8=0`

`->(x-1)(x-8)=0`

`->x=1(tm)` hoặc `x=8(ktm)`

`->S={1}`

h)`x^2+\sqrt(x^2-3x+5)=3x+7(x>=-7/3)`

`->x^2-3x+5+\sqrt(x^2-3x+5)-12=0`

`->(\sqrt(x^2-3x+5)-3)(\sqrt(x^2-3x+5)+4)=0`

`->\sqrt(x^2-3x+5)=3` do `\sqrt(x^2-3x+5)+4>0`

`->x^2-3x+5=9`

`->x^2-3x-4=0`

`->(x+1)(x-4)=0`

`->x=-1(tm)` hoặc `x=4(tm)`

`->S={-1;4}`