Respuestas

2014-02-13T20:50:55+01:00
-6x^3+4x^2=0
x^2(-6x+4)=0
x=0
-6x+4=0
x=4/6=2/3

9x^2-6x-8=0
x=(6+-raiz(36+324)9/18=(6+-18)/18=

x=4/3    x=-2/3

x^3-8=x^2+2x+4
x^3-x^2-2x-12=0

x=3
x= nº imaginario