Respuesta :

x cubed +3x squared - 4x= 0
= x^3 + 3x^2 -4x = 0
=x(x^2 +3x -4) = 0
= x (x+4)(x-1) = 0

x = 0
x+ 4 = 0 then x = -4
x - 1 = 0 then x = 1
answer: x = 0, x = -4 and x = 1
wolffiegirl

x(x^2-3x-4)=0 
factor 
x(x-4)(x+1)=0 

x=0 
x=4 
x=-1