Question

PLEASE HELP!!!

Approximate the real number solutions to the polynomial function f(x) = x3 + 4x2 - 4x - 16 .

a.) x = -4, x = -2, x = 2
b.) x = -2, x = 2, x = 4
c.) x = -4, x = -2, x = 4
d.) x = -4, x = 2, x = 4

Answer 1

i would say A. Easiest way to check is to plug in and see if they= 0

Answer 2

f(x) = (x - 2) (x + 2) (x + 4) I agree Timo86m. Its A.

Answer 3

thank you! a was the correct answer!!