Question

1

Answer 1

what do you want to know , what is the value where the function is zero?

Answer 2

factor:
(x+3)(x^2-16) =0
(x+3)(x+4)(x-4)=0

Answer 3

soory that is (x-3)(x+4)(x-4) = 0

Answer 4

let x=3 it makes the function zero.
f(3)=0
it means x-3 is a factor of f(x).
divide the f(x) by x-3
then factorize you will find the value of x.