Cine Ma ajuta si pe mine ????

Răspuns:
a)
[tex]\frac{9+27}{2}=\frac{36}{2}=18[/tex]
[tex]\sqrt{9\cdot27}=\sqrt{243}=9\sqrt{3}[/tex]
b)
[tex]\sqrt{18x}=24=>3\sqrt{2x}=24=>\sqrt{2x}=8=>2x=64=>x=32[/tex]