Question 206766
{{{f(x)=5x^2-4x}}}
{{{f(0)=5(0)^2-4(0) = 0}}}
{{{f(-1)=5(-1)^2-4(-1)=5+4=9}}}
{{{f(2)=5(2)^2-4(2)=20-8=12}}}

You got it!