Răspuns :
[tex] \sqrt{x+1} =3/2[/tex] (ridicam la patrat )
x+1=9/4
x=9/4-1
x=5/4
x+1=9/4
x=9/4-1
x=5/4
[tex] \sqrt{x+1}= \frac{3}{2} \\ x+1= \frac{9}{4} \\ x= \frac{9}{4}-1 \\ x= \frac{5}{4} [/tex]