Question 58148
{{{f(x)=x^3-4x^2}}}
Plug in {{{x=x/2}}}
{{{f(x/2)=(x/2)^3-4(x/2)^2}}}
{{{f(x/2)=x^3/8-(4/4)*x^2}}}
{{{f(x/2)=(1/8)x^3-x^2}}}