Let f(x) = x2 − 4 and g(x) = 4x − 3, how do you find (f − g)(−6)?

Question

1772 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-03-31T01:52:41

$59$

$(f-g)(x)=f(x)-g(x)$ . so $(f-g)(x)=x^2-4x-1$ . Plugging in -6, you get that the answer is $59$

Answer 2 · 2018-03-31T01:53:17

$(f-g)(-6)=59$

$(f-g)(-6)$ = $f(-6)-g(-6)$

$f(-6)=(-6)^2-4$
$f(-6)=36-4$
$f(-6)=32$

$g(-6)=4(-6)-3$
$g(-6)=-24-3$
$g(-6)=-27$

$f(-6)-g(-6)$
$32-(-27)$
$32+27$
$59$