Question 934183

If {{{f(x)=(7x-3)}}} and {{{g(x)=(x-4)}}}, 

then {{{(fg)(x)=f(x)*g(x)}}}

{{{(fg)(x)=(7x-3)*(x-4)}}}

{{{(fg)(x)=7x^2-7x*4-3*x-3(-4)}}}

{{{(fg)(x)=7x^2-28x-3x+12}}}

{{{(fg)(x)=7x^2-31x+12}}}