Question

Find f(x)..................

Answer 1

Just substitute x= -1.

We get ,

$f(x) = { - 1}^{3} + 4( - 1) + 12$

$f(x) = - 1 - 4 + 12$

$f(x) = 7$

So,

$\huge\boxed{☆f(x)=7☆ }$