Question 768509
{{{f(x)=x^2-2x+1}}}


Substitute into the requested expression, the difference quotient.


{{{(((x+h)^2-2(x+h)+1)-(x^2-2x+1))/h}}}
{{{((x^2+2xh+h^2-2x-2h+1)-(x^2-2x+1))/h}}}
{{{(x^2+2xh+h^2-2x-2h+1-x^2+2x-1)/h}}}
{{{(2xh+h^2-2h)/h}}}
{{{highlight(2x+h-2)}}}