Question 1019690

This problem is giving me fits!! Please help!!

Given that f(x)=x^2-13 and g(x)=18-x find (f-g)(-3)
<pre>{{{f(x) = x^2 - 13}}}		;		g(x) = 18 – x
(f- g)(- 3) means: f(- 3) – g(- 3)

{{{f(x) = x^2 - 13}}}
{{{f(- 3) = (- 3)^2 - 13}}}
f(- 3) = 9 – 13, or – 4

g(x) = 18 – x
g(- 3) = 18 - - 3, or 18 + 3, or 21

(f- g)(- 3) = f(- 3) – g(- 3) = - 4 – 21 = {{{highlight_green(- 25)}}}