Question 1196458
Find and simplify each of the following for 


{{{f(x)=3x^2-9x+8}}}

A.


{{{ f(x+h)=3(x+h)^2-9(x+h)+8}}}

{{{ f(x+h)=3(h^2 + 2hx + x^2)-9x-9h+8}}}

{{{ f(x+h)=3h^2 + 6hx + 3x^2-9x-9h+8}}}

{{{ f(x+h)= 3x^2-9x+ 6hx-9h+3h^2  +8}}}


B

 {{{f(x+h)-f(x)=3x^2-9x+ 6hx-9h+3h^2  +8-(3x^2-9x+8)}}}

{{{f(x+h)-f(x)=3x^2-9x+ 6hx-9h+3h^2  +8-3x^2+9x-8}}}

{{{f(x+h)-f(x)=3h^2 + 6hx - 9h}}}

{{{f(x+h)-f(x)=h(3h + 6x - 9)}}}


C 

{{{(f(x+h)-f(x))/h=h(3h + 6x - 9)/h}}}

{{{(f(x+h)-f(x))/h=3h + 6x - 9}}}