Question 976097
x^3-4x^2+4x=0

x(x^2+4x+4)=0

x(x+2)(x+2)=0

x=0,-2,-2

The double roots are -2, and there is a "bounce" at x=-2

{{{graph(300,300,-10,10,-10,10,x^3-4x^2+4x)}}}