[tex]a)\\\\2x^3=4x^2 \\\\2x^3-4x^2=0\\\\2x^2(x-2)=0\\\\2x^2=0\ \ lub\ \ x-2=0\\\\x=0\ \ lub\ \ x=2[/tex]
[tex]b)\\\\ x^5=9x^3\\\\x^5-9x^3=0\\\\x^3(x^2-9)=0\\\\x^3(x+3)(x-3)=0\\\\x^3=0\ \ lub\ \ x+3=0\ \ lub\ \ x-3=0\\\\x =0\ \ lub\ \ x=-3\ \ lub\ \ x=3[/tex]
