Răspuns:
Explicație pas cu pas:
a)
[tex]x=3\sqrt{2} \\x^3=3^3*(\sqrt{2} )^3=54\sqrt{2}[/tex]
b)
[tex]x=3\sqrt{3} \\x^3=3^3*(\sqrt{3} )^3=27*3\sqrt{3} =81\sqrt{3}[/tex]
c)
[tex]x=4\sqrt{2} \\x^3=4^3*(\sqrt{2})^3 =64*2\sqrt{2} =128\sqrt{2}[/tex]
d)
[tex]x=5\sqrt{12}-4\sqrt{75} =5\sqrt{4*3}-4\sqrt{25*3}=10\sqrt{3} -20\sqrt{3} =-10\sqrt{3} \\x^3=(-10\sqrt{3})^3=-1000*3\sqrt{3}=-3000\sqrt{3}[/tex]
e)
[tex]x=3\sqrt{96}-5\sqrt{24} =3\sqrt{16*6}-5\sqrt{4*6}=12\sqrt{6} -10\sqrt{6}=2\sqrt{6} \\x^3=(2\sqrt{6})^3=2^3*6\sqrt{6} =48\sqrt{6}[/tex]
f) NU SE VEDE CLAR, sub acel ultim radical...
